1.
ET radiomics-based lymphovascular invasion prediction in lung cancer using multiple segmentation and multi-machine learning algorithms
Seyyed Ali Hosseini, Ghasem Hajianfar, Pardis Ghaffarian, Milad Seyfi, Elahe Hosseini, Atlas Haddadi Aval, Stijn Servaes, Mauro Hanaoka, Pedro Rosa-Neto, Sanjeev Chawla, Habib Zaidi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Physical and Engineering Sciences in Medicine,2024,P1-13
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2.
PET Images Enhancement Using Deep Training of Reconstructed Images with Bayesian Penalized Likelihood Algorithm
Ali Ghafari, Mahsa Shahrbabaki Mofrad, Nima Kasraie, Mohammad Reza Ay, Negisa Seyyedi, Peyman Sheikhzadeh
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Peer-reviewed Journal Publication
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Journal of Medical and Biological Engineering,2024,P 1-8
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3.
Design and implementation of continuous bed motion (CBM) in Xtrim preclinical PET scanner for whole-body Imaging: MC simulation and experimental measurements
Bahador Bahadorzadeh, Reza Faghihi, Sedigheh Sina, Ahdiyeh Aghaz, Arman Rahmim, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Physica Medica,2024,V 123,P 103395
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4.
Development of novel and low-cost readout electronics for large FOV gamma camera detector
Aram Radnia, Amirhossein Alikhani, Behnoosh Teimourian, Mahyar Youser Nejad, Mohammad Hossein Farahani, Fakhereh Pashaei, Arman Rahmim, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Physica Medica,2024,V 121
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5.
Implementation of the wobbling technique with spatial resolution enhancement approach in the Xtrim-PET preclinical scanner: Monte Carlo simulation and performance evaluation
Bahador Bahadorzadeh, Reza Faghihi, Sedigheh Sina, Ahdiyeh Aghaz, Arman Rahmim, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies,2024,
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6.
The effect of harmonization on the variability of PET radiomic features extracted using various segmentation methods
Seyyed Ali Hosseini, Isaac Shiri, Pardis Ghaffarian, Ghasem Hajianfar, Atlas Haddadi Avval, Milad Seyfi, Stijn Servaes, Pedro Rosa-Neto, Habib Zaidi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Annals of Nuclear Medicine,2024,P 1-15
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7.
Automated deep identification of radiopharmaceutical type and body region from PET images
Ali Ghafari, Peyman Sheikhzadeh, Negisa Seyyedi, Mehrshad Abbasi, Shadab Ahamed, Mohammad Reza Ay, Arman Rahmim
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Peer-reviewed Journal Publication
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Iranian Journal of Nuclear Medicine,2024
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8.
Deep learning-based partial volume correction in standard and low-dose positron emission tomography-computed tomography imaging
Mohammad-Saber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Navid Zeraatkar, Mahboubeh-Sadat Hosseini, Amirhossein Sanaat, Habibollah Dadgar, Hossein Arabi
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Peer-reviewed Journal Publication
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Quantitative Imaging in Medicine and Surgery,2024,V 14, P 2146
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9.
Attention-based deep neural network for partial volume correction in brain 18F-FDG PET imaging
MohammadSaber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Navid Zeraatkar, Mahboube-Sadat Hosseini, Amirhossein Sanaat, Hossein Arabi
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Peer-reviewed Journal Publication
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Physica Medica, 2024,V 119
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10.
Design and performance evaluation of partial geometry configurations of total-body PET: A Monte Carlo study
Hadi Rezaei, Peyman Sheikhzadeh, Pardis Ghafarian, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Iranian Journal of Nuclear Medicine,2024,V 32,P 52-59
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11.
Multimodality radiomics prediction of radiotherapy-induced the early proctitis and cystitis in rectal cancer patients: A machine learning study
Samira Abbaspour, Maedeh Barahman, Hamid Abdollahi, Hossein Arabalibeik, Ghasem Hajianfar, Mohammadreza Babaei, Hamed Iraji, Mohammadreza Barzegartahamtan, Mohammadreza Ay, Seied Rabi Mahdavi
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Peer-reviewed Journal Publication
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Biomedical Physics & Engineering Express,2023
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12.
Impact of random and scattered coincidences from outside of field of view on positron emission tomography/computed tomography imaging with different reconstruction protocols
Mahak Osouli Alamdari, Pardis Ghafarian, Arman Rahmim, Mehrdad Bakhshayesh-Karam, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Nuclear Science and Techniques,2023, V34,P 1-13
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13.
Accurate modeling and performance evaluation of a total‐body pet scanner using Monte Carlo simulations
Hadi Rezaei, Peyman Sheikhzadeh, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Medical Physics,2023, V 50,P6815-6827
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14.
The effects of various penalty parameter values in Q.Clear algorithm for rectal cancer detection on 18F‑FDG images using
a BGO‑based PET/CT scanner: a phantom
and clinical study
Fatemeh Sadeghi, Peyman Sheikhzadeh* , Saeed Farzanehfar , Pardis Ghafarian*, Yalda Moafpurian and Mohammadreza Ay
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Peer-reviewed Journal Publication
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EJNMMI physics,2023,V 10,P 63
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15.
List-mode quantitative joint reconstruction of activity and attenuation maps in Time-of-Flight PET
Hamidreza Hemmati, Alireza Kamali-Asl, Pardis Ghafarian, Arman Rahmim, Habib Zaidi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Journal of Instrumentation,V 18,P P09041
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16.
FEASIBILITY OF [64CU] CU-TRASTUZUMAB PET/CT IMAGING IN BREAST CANCER: A SYSTEMATIC REVIEW
Ali Abdulhasan Kadhim, Peyman Sheikhzadeh, Mehrshad Abbasi, Nasim Vahidfar, Saeed Afshar, Mohsen Bakhshi Kashi, Negisa Seyyedi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Journal of Population Therapeutics and Clinical Pharmacology, 2023,V 30, P 2375-2385
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17.
Phantom and clinical evaluation of Block Sequential Regularized Expectation Maximization (BSREM) Reconstruction Algorithm in 68Ga-PSMA PET/CT Studies
Fatemeh Sadeghi, Peyman Sheikhzadeh, Nima Kasraie, Saeed Farzanehfar, Mehrshad Abbasi, Yalda Salehi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Physical and Engineering Sciences in Medicine, V 3,P 1297-1308
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18.
Evaluation of deep-learning based partial volume correction of PET images without the use of anatomical information
Mohammad-Saber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Mahboube Sadat Hosseini, Fatemeh Khorshidi, Yalda Moafpourian, Hossein ARABI, Arman Rahmim, Habib Zaidi
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Peer-reviewed Journal Publication
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Journal of Nuclear Medicine, V 64, P971-P971
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19.
Reproducibility of radiomics features in partial volume correction of PET images
Mohammad-Saber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Mahboube Sadat Hosseini, Fatemeh Khorshidi, Hossein ARABI, Arman Rahmim, Habib Zaidi
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Peer-reviewed Journal Publication
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Journal of Nuclear Medicine,V64,P994-P994
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20.
Evaluation and optimization of geometry parameters of GAGG scintillator-based Compton Camera for medical imaging by Monte Carlo simulation
Hajar Zarei, S Razaghi, Y Nagao, M Itoh, M Yamaguchi, N Kawachi, MR Ay, H Watabe
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Peer-reviewed Journal Publication
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Journal of Instrumentation,2023,V18, P01035
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21.
Role of Lesion-to-Background Activity Ratio and Background Activity in Optimization of Reconstruction Protocols for FDG PET/CT Images of Overweight Patients: A Phantom Study
Samira Rezvani, Pardis Ghafarian, Mehrdad Bakhshayesh Karam, Mohammadreza Ay
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Peer-reviewed Journal Publication
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Iranian Journal of Radiology,2023,
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22.
Realizing 32-time Scan Duration Reduction of 18F-FDG PET Using a Cycle-GAN and Image Augmentation
Ali Ghafari, Peyman Sheikhzadeh, Negisa Seyyedi, Mehrshad Abbasi, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies
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23.
Reducing scan time using time-of-flight protocol in clinical [18F] FDG-PET/CT imaging: A feasibility study
Roya Sharifpour, Pardis Ghafarian, Mehrdad Bakhshayesh-Karam, Carlos F Uribe, Arman Rahmim, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Iranian Journal of Nuclear Medicine,2022,P 1-16
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24.
Impact of Various Image Reconstruction Methods on Joint Compensation of Respiratory Motion and Partial Volume Effects in Whole-Body 18F-FDG PET/CT Imaging: Patients with Non-Small Cell Lung Cancer
Pardis Ghafarian, Sahar Rezaei, Esmaeil Gharepapagh, Saeid Sarkar, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Iran South Med J 2022, 25(4): 355-370
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25.
Endorectal ultrasound radiomics in locally advanced rectal cancer patients: despeckling and radiotherapy response prediction using machine learning
Samira Abbaspour, Hamid Abdollahi, Hossein Arabalibeik, Maedeh Barahman, Amir Mohammad Arefpour, Pedram Fadavi, Mohammadreza Ay & Seied Rabi Mahdavi
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Peer-reviewed Journal Publication
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Nuclear Medicine Communications,2022,V 43,P 1004-1014
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26.
Generation of 18F-FDG PET standard scan images from short scans using cycle-consistent generative adversarial network
Ali Ghafari, Peyman Sheikhzadeh, Negisa Seyyedi, Mehrshad Abbasi, Saeed Farzenefar, Fereshteh Yousefirizi, Mohammadreza Ay, Arman Rahmim
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Peer-reviewed Journal Publication
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Physics in Medicine & Biology,2022,P 355-370
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27.
Deep Learning Based Missing Information Recovery in Partial Ring Total Body PET Scanner
H Rezaei, P Sheikhzadeh, P Ghafarian, I Shiri, M Ay
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Proceeding and Conference Record
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49,S78-S79
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28.
Development of Reconstruction Algorithm for High Resolution microPET Scanner Using Siddon-based System Matrix
S Hariri Tabrizi, B Teimourian, M Farahani, M Ay
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Proceeding and Conference Record
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49, S426-S426
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29.
High Resolution PET Detector Design Using SiPM Array
A Radnia, M Farahani, M Ay
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Proceeding and Conference Record
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49,S450-S450
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30.
Impact of Different Crystal Material on Performance Characteristics of Long Axial Field-Of-View PET Scanner: A Monte Carlo Simulation Study
H Rezaei, M Ay
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|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49,S79
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31.
Optimization of Time Coincidence Window and Energy Window for Dedicated Brain PET: A Simulation Study
T Zare, P Sheikhzadeh, A Rahmim, B Teimourian Fard, P Ghafarian, M Ay
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Proceeding and Conference Record
|
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49,S595
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32.
Potential advantages of FDG‐PET radiomic feature map for target volume delineation in lung cancer radiotherapy
Zahra Falahatpour, Parham Geramifar, Seyed Rabie Mahdavi, Hamid Abdollahi, Yazdan Salimi, Alireza Nikoofar, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Journal of Applied Clinical Medical Physics,2022,V23
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33.
The impact of Different Reconstruction Parameters along with TOF and PSF in PET/CT Imaging: Patient with Normal and High BMI
S Rezvani, P Ghafarian, M Ay
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Proceeding and Conference Record
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2022,V49,S594
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34.
Comparison of The Performance of Denoising Filters in Improving The Quality of Low-Dose Brain PET Images With Two Dose Levels of 5% and 10%
Mohammad-Saber Azimi, Alireza Kamali-asl, Mohammad-Reza Ay, Hossein Arabi
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Peer-reviewed Journal Publication
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medical journal of mashhad university of medical sciences,2022, Vol 65
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35.
Deep Learning-Based Partial Volume Correction in Standard and Low-Dose PET-CT Imaging
Mohammad-Saber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Navid Zeraatkar, Hossein Arabi
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Peer-reviewed Journal Publication
|
|
arXiv preprint arXiv:2207.02553
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36.
Comparative assessment of attention-based deep learning and non-local mean filtering for joint noise reduction and partial volume correction in low-dose PET imaging
Mohammad-Saber Azimi, Alireza Kamali-Asl, Mohammad-Reza Ay, Navid Zeraatkar, Mahboube Sadat Hosseini, Hossein ARABI, Habib Zaidi
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|
Peer-reviewed Journal Publication
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Journal of Nuclear Medicine, 2022, Vol 63, P 2729-2729
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37.
Harmonization based on quantitative analysis of standardized uptake value variations across PET/CT scanners: a multicenter phantom study
Abbas Monsef, Mohammad Reza Ay, Peyman Sheikhzadeh, Parham Geramifar, Arman Rahmim, Pardis Ghafarian
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Peer-reviewed Journal Publication
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Nuclear Medicine Communications,2022,V43, P1004-1014
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38.
A deep learning method for high-quality ultra-fast CT image reconstruction from sparsely sampled projections
Hamidreza Khodajou-Chokami, Seyed Abolfazl Hosseini, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,2022,Vol 1029
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39.
Synergistic impact of motion and acquisition/reconstruction parameters on 18F-FDG PET radiomic features in non-small cell lung cancer: phantom and clinical studies
Seyyed Ali Hosseini,Isaac Shiri,Ghasem Hajianfar,Bahador Bahadorzade,Pardis Ghafarian,Habib Zaidi,Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Medical Physics,2022
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40.
Necessity of Development and Manufacturing of Dedicated Brain PET Scanners
Peyman Sheikhzadeh, Mohammadreza Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies,2022,V9, p74-75
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41.
PARS-NET: a novel deep learning framework using parallel residual conventional neural networks for sparse-view CT reconstruction
H Khodajou-Chokami, SA Hosseini, MR Ay
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Peer-reviewed Journal Publication
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Journal of Instrumentation,2022, Vol 17
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42.
A novel approach for extracting functional brain networks involved in mesial temporal lobe epilepsy based on self organizing maps
Alireza Fallahi, Mohammad Pooyan, Jafar Mehvari Habibabadi, Seyed Sohrab Hashemi-Fesharaki, Narges Hoseini Tabatabaei, Mohammadreza Ay, Mohammad-Reza Nazem-Zadeh
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Peer-reviewed Journal Publication
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Informatics in Medicine Unlocked,2022, Vol 29, P 100876
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43.
Statistical analysis of COVID-19 infection severity in lung lobes from chest CT
Mehdi Yousefzadeh, Mozhdeh Zolghadri, Masoud Hasanpour, Fatemeh Salimi, Ramezan Jafari, Mehran Vaziri Bozorg, Sara Haseli, Abolfazl Mahmoudi Aqeel Abadi, Shahrokh Naseri, Mohammadreza Ay, Mohammad-Reza Nazem-Zadeh
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Peer-reviewed Journal Publication
|
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Informatics in Medicine Unlocked,2022,P 100935,
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44.
Leveraging Deep Neural Networks to Improve Numerical and Perceptual Image Quality in, Low-dose Preclinical PET Imaging
Mahsa Amirrashedi, Saeed Sarkar, Hojjat Mamizadeh, Hossein Ghadiri, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Computerized Medical Imaging and Graphics,2021,P 102010
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45.
The Impact of Preprocessing on the PET-CT Radiomics Features in Non-small Cell Lung Cancer
Seyyed Ali Hosseini, Isaac Shiri, Ghasem Hajianfar, Pardis Ghafarian, Mehrdad Bakhshayesh Karam, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,2021,V 8
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46.
Accurate Monte Carlo Modeling and Performance Evaluation of a Total-body PET Scanner
Hadi Rezaei, Peyman Sheikhzadeh, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay
|
|
Proceeding and Conference Record
|
|
2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC),P 1-3
|
47.
Temporal and extratemporal atrophic manifestation of temporal lobe epilepsy using voxel-based morphometry and corticometry: clinical application in lateralization of epileptogenic zone
Majdi Jber, Jafar Mehvari Habibabadi, Roya Sharifpour, Hengameh Marzbani, Masoud Hassanpour, Milad Seyfi, Neda Mohammadi Mobarakeh, Ahmedreza Keihani, Seyed Sohrab Hashemi-Fesharaki, Mohammadreza Ay, Mohammad-Reza Nazem-Zadeh
|
|
Peer-reviewed Journal Publication
|
|
Neurological Sciences,2021,P 1-21
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48.
Introducing a novel Polyvinyl chloride/Tungsten composites for shielding against
gamma and X-ray radiations
Tohid Abdolahzadeh1 , Jalil Morshedian1 , Shervin Ahmadi1 , Mohammad Reza Ay2,3 , Omid Mohammadi
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Peer-reviewed Journal Publication
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Iranian Journal of Nuclear Medicine,2021,vol 29- p 58-64
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49.
Introducing the GammaPen: All-in-One Gamma Probe for Sentinel Lymph Node Biopsy
Aram Radnia, Hamed Abdollahzadeh, Behnoosh Teimourian, Mohammad Hossein Farahani, Mohammad Reza Ay
|
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Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,2021
|
50.
Dynamic functional connectivity in temporal lobe epilepsy: a graph theoretical and machine learning approach
Alireza Fallahi, Mohammad Pooyan, Nastaran Lotfi, Fatemeh Baniasad, Leili Tapak, Neda Mohammadi-Mobarakeh, Seyed Sohrab Hashemi-Fesharaki, Jafar Mehvari-Habibabadi, Mohammad Reza Ay, Mohammad-Reza Nazem-Zadeh
|
|
Peer-reviewed Journal Publication
|
|
Neurological Sciences,2021,Vol 42
|
51.
A Deep Neural Network To Recover Missing Data In Small Animal Pet Imaging: Comparison Between Sinogram-And Image-Domain Implementations
Mahsa Amirrashedi, Saeed Sarkar, Hossein Ghadiri, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay
|
|
Proceeding and Conference Record
|
|
2021 IEEE 18th International Symposium on Biomedical Imaging (ISBI)
|
52.
Standard-dose PET reconstruction from low-dose preclinical images using an adopted all convolutional U-Net
Mahsa Amirrashedi, Saeed Sarkar, Hossein Ghadiri, Pardis Ghafarian, Mohammad Reza Ay
|
|
Proceeding and Conference Record
|
|
Medical Imaging 2021: Biomedical Applications in Molecular, Structural, and Functional Imaging
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53.
Development and characterization of an all-in-one gamma probe with auto-peak detection for sentinel lymph node biopsy based on NEMA NU3-2004 standard
Aram Radnia, Hamed Abdollahzadeh, Behnoosh Teimourian, Mohammad Hossein Farahani, Mohammad Esmaeil Akbari, Habib Zaidi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Annals of Nuclear Medicine,2021,Vol 35,P 1-9
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54.
Advances in Preclinical PET Instrumentation
Mahsa Amirrashedi, Habib Zaidi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Elsevier,2020, V4,p403-426
|
55.
Measurement of Radiation Exposure to Caregivers of Patients with Thyroid Diseases Treated with Iodine-131: A Review
Ali Abdulhasan Kadhim, Peyman Sheikhzadeh, Saeed Farzanefar, Shima Yavari, Majdi Mousa Jber, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,Vol 7,P 191-199
|
56.
Evaluation of gamma and electron radiations impact on vitamins for onion preservation
Salar Firouzi, Abdollah Khorshidi, Jamshid Soltani-Nabipour, Seyed Mohsen Zia Barzi, Mohammad Amani, Majid Sorouri, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Applied Radiation and Isotopes,2020
|
57.
Towards quantitative small-animal imaging on hybrid PET/CT and PET/MRI systems
Mahsa Amirrashedi, Habib Zaidi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Clinical and Translational Imaging,2020
|
58.
Radiation Dose Assessment to Family Members Taking Care of Non-Cancerous Thyroid Patients Treated with I-131 Therapy in Nuclear Medicine Department
Ali Abdulhasan Kadhim, Peyman Sheikhzadeh, Saeed Farzanefar, Shima Yavari, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Radiation Protection Dosimetry,2020
|
59.
Deep-JASC: joint attenuation and scatter correction in whole-body 18F-FDG PET using a deep residual network
Isaac Shiri, Hossein Arabi, Parham Geramifar, Ghasem Hajianfar, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay & Habib Zaidi
|
|
Peer-reviewed Journal Publication
|
|
European Journal of Nuclear Medicine and Molecular Imaging, 2020
|
60.
Guidelines for TMS/tES Clinical Services and Research through the COVID-19 Pandemic
Marom Bikson, Colleen A Hanlon, Adam J Woods, Bernadette T Gillick, Leigh Charvet, Claus Lamm, Graziella Madeo, Adrienn Holczer, Jorge Almeida, Andrea Antal, Mohammad Reza Ay,
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|
Peer-reviewed Journal Publication
|
|
Brain Stimulation, Elsevier,2020
|
61.
Standard SPECT myocardial perfusion estimation from half-time acquisitions using deep convolutional residual neural networks
Isaac Shiri, Kiarash AmirMozafari Sabet, Hossein Arabi, Mozhgan Pourkeshavarz, Behnoosh Teimourian, Mohammad Reza Ay, Habib Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Journal of nuclear cardiology: official publication of the American Society of Nuclear Cardiology,2020
|
62.
Performance evaluation of developed dedicated breast PET scanner and improvement of the spatial resolution by wobbling: a Monte Carlo study.
A Emami, H Ghadiri, P Ghafarian, P Geramifar, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Japanese journal of radiology,2020,P 1-10
|
63.
6th Anniversary Editorial
Mahnaz Kiani Mobareke, Mohmmadreza Ay
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|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,Vol 7, P 1-2
|
64.
Novel preclinical PET geometrical concept using a monolithic
scintillator crystal offering concurrent enhancement in spatial
resolution and detection sensitivity: a simulation study
Amirhossein Sanaat , HosseinArabi , MohammadReza Ay and Habib Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine & Biology,2020
|
65.
Computationally efficient system matrix calculation techniques in computed tomography iterative reconstruction
Golshan Mahmoudi, Mohammad Reza Ay, Arman Rahmim, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
Journal of Medical Signals and Sensors,2020,Vol 10, p 1-11
|
66.
Corrigendum to" Targeted gold nanoparticles enable molecular CT imaging of head and neck cancer: An in vivo study
Sara Khademi, Saeed Sarkar, Ali Shakeri-Zadeh, Neda Attaran, Sharmin Kharrazi, Mohammad Reza Ay, Hosein Azimian, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
The International Journal of Biochemistry & Cell Biology,2020, Vol 10,P 1
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67.
Molecular imaging approaches in the diagnosis of breast cancer: A systematic review and meta-analysis
Getu Ferenji Tadesse, Parham Geramifar, Pardis Ghafarian, Eshetu Ejeta Cheka, Eyachew Misgana Tegaw, Seifu Gizaw Feyisa, Ramin Sadeghi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
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|
Iranian Journal of Nuclear Medicine,2020,Vol 28, P 1-13
|
68.
The impact of iterative reconstruction protocol, signal‑to‑background
ratio and background activity on measurement of PET spatial
resolution
Sahar Rezaei1,2 · Pardis Ghafarian3,4 · Mehrdad Bakhshayesh‑Karam3,4 · Carlos F. Uribe5 · Arman Rahmim6,7 · Saeed Sarkar2 · Mohammad Reza Ay1,2
|
|
Peer-reviewed Journal Publication
|
|
Japanese Journal of Radiology ,2020,
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69.
Validation and evaluation of a GATE model for MAMMI PET scanner
Azadeh Emami, Pardis Ghafarian, Hossien Ghadiri, Parham Geramifar, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine,2020,Vol 28, P 33-38
|
70.
Novel preclinical PET geometrical concept using a monolithic scintillator crystal offering concurrent enhancement in spatial resolution and detection sensitivity: a simulation …
Amirhossein Sanaat, Hossein Arabi, Mohammadreza Ay, Habib Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine & Biology,2019,
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71.
Joint compensation of motion and partial volume effects by iterativedeconvolution incorporating wavelet-based denoising in oncologic PET/CTimaging
Sahar Rezaei,Pardis Ghafarian,Abhinav K. JhaArman Rahmim,Saeed Sarkar,Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
physica media,2019,Vol 68,P 52-60
|
72.
Targeted gold nanoparticles enable molecular CT imaging of head and neck cancer: an in vivo study
Sara Khademi, Saeed Sarkar, Ali Shakeri-Zadeh, Neda Attaran, Sharmin Kharrazi, Mohammad Reza Ay, Hosein Azimian, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
The international journal of biochemistry & cell biology,2018,Vol 114
|
73.
Sparse-view statistical image reconstruction with improved total variation regularization for X-ray micro-CT imaging
G Mahmoudi, MR Fouladi, MR Ay, A Rahmim, H Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation, 2019, Vol 14
|
74.
NEMA NU‐4 2008 Performance Evaluation of Xtrim‐PET: A prototype Si PM‐based preclinical scanner
Mahsa Amirrashedi, Saeed Sarkar, Pardis Ghafarian, Reza Hashemi Shahraki, Parham Geramifar, Habib Zaidi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Medical physics,2019
|
75.
A novel approach to automatic position calibration for pixelated crystals in gamma imaging
Salar Sajedi, Navid Zeraatkar, Sanaz Kaviani, Hadi Khanmohammadi, Saeed Sarkar, Hamid Sabet, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine,2019,Vol 27
|
76.
Dual-energy CT imaging of nasopharyngeal cancer cells using multifunctional gold nanoparticles
Hossein Ghadiri, Sara Khademi, Saeed Sarkar, Ali Shakeri-zadeh, Neda Attaran, Mohammad Reza Ay, Hosein Azimian, Razieh Solgi
|
|
Peer-reviewed Journal Publication
|
|
IET Nanobiotechnology, 2019
|
77.
The influence of misregistration between CT and SPECT images on the accuracy of CT-based attenuation correction of cardiac SPECT/CT imaging: Phantom and clinical studies
Leila Saleki, Pardis Ghafarian, Ahmad Bitarafan-Rajabi, Nahid Yaghoobi, Babak Fallahi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine,2019,Vol 27,pp63-72
|
78.
Validation and evaluation of a GATE model for MAMMI PET scanner
Azadeh Emami, Pardis Ghafarian, Hossien Ghadiri, Parham Geramifar, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine,2019
|
79.
A Novel Method for Measuring the MTF of CT Scanners: A Phantom Study
Hamidreza Khodajou-Chokami, Seyed Abolfazl Hosseini, Mohammad Reza Ay, Ali Safarzadehamiri, Pardis Ghafarian, Habib Zaidi
|
|
Proceeding and Conference Record
|
|
2019 IEEE International Symposium on Medical Measurements and Applications
|
80.
MCNP-FBSM: Development of MCNP/MCNPX Source Model for Simulation of Multi-Slice Fan-Beam X-Ray CT Scanners
Hamidreza Khodajou-Chokami, Seyed Abolfazl Hosseini, Mohammad Reza Ay, Habib Zaidi
|
|
Proceeding and Conference Record
|
|
2019 IEEE International Symposium on Medical Measurements and Applications
|
81.
Direct attenuation correction of brain PET images using only emission data via a deep convolutional encoder-decoder (Deep-DAC)
Isaac Shiri, Pardis Ghafarian, Parham Geramifar, Kevin Ho-Yin Leung, Mostafa Ghelichoghli, Mehrdad Oveisi, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
European radiology,2019,pp1-3
|
82.
Development and preliminary results of Xtrim-PET, a modular cost-effective preclinical scanner
Salar Sajedi, Navid Zeraatkar, Mohsen Taheri, Sanaz Kaviani, Hadi Khanmohammadi, Saeed Sarkar, Hamid Sabet, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
2019, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
|
83.
Deep-Fill: Deep Learning Based Sinogram Domain Gap Filling in Positron Emission Tomography
Isaac Shiri, Peyman Sheikhzadeh, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
arXiv preprint arXiv:1906.07168
|
84.
Design, optimization and performance evaluation of BM-PET: A simulation study
Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Pardis Ghafarian, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
|
85.
PSFNET: ultrafast generation of PSF-modelled-like PET images using deep convolutional neural network
Isaac Shiri, Kevin Leung, Parham Geramifar, Pardis Ghafarian, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Journal of Nuclear Medicine,2019,vol 60,pp 1369-1369
|
86.
HiResPET: high resolution PET image generation using deep convolution encoder decoder network
Isaac Shiri, Kevin Leung, Pardis Ghafarian, Parham Geramifar, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Journal of Nuclear Medicine,2019,vol 60,pp 1368-1368
|
87.
Simultaneous Attenuation Correction and Reconstruction of PET Images Using Deep Convolutional Encoder Decoder Networks from Emission Data
Isaac Shiri, Kevin Leung, Pardis Ghafarian, Parham Geramifar, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Journal of Nuclear Medicine,2019,vol 60
|
88.
Impact of image reconstruction methods on quantitative accuracy and variability of FDG-PET volumetric and textural measures in solid tumors
Ali Ketabi, Pardis Ghafarian, Mohammad Amin Mosleh-Shirazi, Seyed Rabi Mahdavi, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
European radiology,2019,vol 29,pp 2146-2156
|
89.
Techniques for generating attenuation map using cardiac SPECT
emission data only: a systematic review
Getu Ferenji Tadesse, Parham Geramifar, Eyachew Misganew Tegaw, Mohammad Reza Ay,
|
|
Peer-reviewed Journal Publication
|
|
Annals of Nuclear Medicine ,21019,Vol 33,P 1-13
|
90.
Design and performance evaluation of high resolution small animal PET scanner based on monolithic crystal: a simulation study
A Sanaat, MS Zafarghandi, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation,2019, Vol 14
|
91.
A full quantitative analysis of 18 MV photon beam from 2100 C/D-Varian clinical linear accelerator with and without flattening filter
SR Mahdavi, MR Ay, M Zabihzadeh, M Allahverdi, M Shahriari, M Hoseini-Ghahfarokhi
|
|
Peer-reviewed Journal Publication
|
|
International Journal of Radiation Research, 2019, Vol 17, P 137-146
|
92.
Design and performance evaluation of spheroid geometry for brain PET scanner using Monte Carlo modeling
Peyman Sheikhzadeh, Hossein Ghadiri, Parham Geramifar, Pardis Ghafarian, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2019, Vol 27, P 32-37
|
93.
Monte Carlo-based optimization of a gamma probe system for sentinel lymph node mapping
Azadeh Nikoogoftar, Mojtaba Shamsaie, Navid Zeraatkar, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine,2019, Vol 27, p 8-14
|
94.
Resolution Recovery with Pre-Reconstruction Fourier Transforms Filtering for a High Resolution Animal SPECT System
Reza Hashemi Shahraki, Isaac Shiri, Parham Geramifar, Afshin Akbarzadeh, Amir Hossein Sanaat, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologiesو2018Vol 5, P 74-80
|
95.
Advantages and disadvantages of removed flattening filter Linac: A Monte Carlo study on full quantitative dosimetric data of 18 MV-Varian Linac
Mansour Zabihzadeh, Seyed Rabee Mahdavi, Mohammad Reza Ay, Mojtaba Hoseini-Ghahfarokhi
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Medical Physics, 2018, Vol 15, P 446
|
96.
Conventional Voxel in Tomographic Reconstruction Based upon Plane-Integral Projections–Use It or Lose It?
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Medical Physics, 2018, Vol 15, P 269-269
|
97.
Conventional Voxel in Tomographic Reconstruction Based upon Plane-Integral Projections–Use It or Lose It?
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Proceeding and Conference Record
|
|
Iranian Journal of Medical Physics,2018, V ol 15, P 261
|
98.
Evaluation of effect of gold nanorods and spherical gold nanoparticles of different sizes on X-ray attenuation in computed tomography
Sara Khademi, Hossein Ghadiri, Saeed Sarkar, Sharmin Kharrazi, Seyed Mohammad Amini, Ali Shakeri-Zadeh, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Medical Physics,2018, Vol 15, P 354
|
99.
Evaluation of multifunctional targeted gold nanoparticles on X-ray attenuation in nasopharyngeal cancer cells by X-ray imaging
Sara Khademi, Hossein Ghadiri, Saeed Sarkar, Ali Shakerizadeh, Neda Attaran, Sharmin Kharrazi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Medical Physics, 2018, Vol 15, P 355
|
100.
Fast System Matrix Calculation in CT Iterative Reconstruction
Golshan Mahmoudi, Mohammad Reza Ay, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Medical Physics, 2018, Vol 15, P 150-150
|
101.
Recovery of missing data in partial geometry PET scanners: Compensation in projection space vs image space
Seyedehsamaneh Shojaeilangari, C Ross Schmidtlein, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Medical physics, 2018, Vol 45, P5437-5449
|
102.
Impact of image reconstruction methods on quantitative accuracy and variability of FDG-PET volumetric and textural measures in solid tumors
Ali Ketabi, Pardis Ghafarian, Mohammad Amin Mosleh-Shirazi, Seyed Rabi Mahdavi, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
European radiology,2018,pp1-11
|
103.
F-18-PSMA vs. Ga-68-PSMA11; S-value Estimation in XCAT BMIs Using GATE Monte Carlo Code
M Fallahpoor, N Vahidfar, G Divband, F Kalantari, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2018, Vol 45,P S737-S737
|
104.
Monte Carlo simulation of MAMMI PET system and performance evaluation using GATE toolkit
A Emami, H Ghadiri, P Ghafarian, P Geramifar, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2018, Vol 45, P S714-S714
|
105.
Uncertainties in effective dose estimation for CT transmission scan in total body PET-CT imaging with Auto mA3D tube current modulation
Y Salimi, MR Deevband, P Ghafarian, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
International Journal of Radiation Research, Vol 16, p 465-472
|
106.
Folic acid-cysteamine modified gold nanoparticle as a nanoprobe for targeted computed tomography imaging of cancer cells
Sara Khademi, Saeed Sarkar, Ali Shakeri-Zadeh, Neda Attaran, Sharmin Kharrazi, Mohammad Reza Ay, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
Materials Science and Engineering: C,2018 ,Vol.89
|
107.
Reconstruction/segmentation of attenuation map in TOF-PET based on mixture models
Hamidreza Hemmati, Alireza Kamali-Asl, Pardis Ghafarian, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Annals of nuclear medicine, 2018, Vol.26, pp 1-11
|
108.
Capturing Bone Signal in MRI of Pelvis, as a Large FOV Region, Using TWIST Sequence and Generating a 5-Class Attenuation Map for Prostate PET/MRI Imaging
Mehdi Shirin Shandiz, Hamid Saligheh Rad, Pardis Ghafarian, Khadijeh Yaghoubi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Molecular imaging, 2018, Vol 17
|
109.
Concept design and Monte Carlo performance evaluation of HeadphonePET: a novel brain-dedicated PET system based on partial cylindrical detectors
P Sheikhzadeh, H Sabet, H Ghadiri, P Geramifar, P Ghafarian, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation, 2018, Vol 13 ,P07008
|
110.
An alternative mathematical modeling of the scintillation camera and framework for performance analysis of gamma-ray positioning algorithms
Behnoosh Teimourian Fard, Mojtaba Shamsaei Zafarghandi, Soheil Hosseini, Hamid Sabet, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2018, v.26, P.112-126
|
111.
The influence of using different reconstruction algorithms on sensitivity of quantitative 18F-FDG-PET volumetric measures to background activity variation
Ali Ketabi, Pardis Ghafarian, Mohammad Amin Mosleh-Shirazi, Seyed Rabi Mahdavi, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2018, Vol.26, pp 87-97
|
112.
Mixture model based joint-MAP reconstruction of attenuation and activity maps in TOF-PET
H Hemmati, A Kamali-Asl, P Ghafarian, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation, 2018, Vol.13
|
113.
Cardiac contraction motion compensation in gated myocardial perfusion SPECT: A comparative studyRobotic system for SPECT imaging
Narges Salehi, Arman Rahmim, Emad Fatemizadeh, Afshin Akbarzadeh, Mohammad Hossein Farahani, Saeed Farzanefar, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Physica Medica, 2018, Vol.49, pp 77-82
|
114.
Generic high resolution PET detector block using 12× 12 SiPM array
Salar Sajedi, Navid Zeraatkar, Mohsen Taheri, Sanaz Kaviani, Hadi Khanmohammadi, Saeed Sarkar, Hamid Sabet, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Biomedical Physics & Engineering Express, 2018, Vol 4
|
115.
A novel dual energy method for enhanced quantitative computed tomography
A Emami, H Ghadiri, A Rahmim, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation, 2018, Vol.13
|
116.
Evaluation of size, morphology, concentration, and surface effect of gold nanoparticles on X-ray attenuation in computed tomography
Sara Khademi, Saeed Sarkar, Sharmin Kharrazi, Seyed Mohammad Amini, Ali Shakeri-Zadeh, Mohammad Reza Ay, Hossein Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
Physica Medica, 2018, Vol 45,pp 127-133
|
117.
Evaluating the Impact of Various Parameters on the Gamma Index Values of 2D Diode Array in IMRT Verification
Keyvan Jabbari, Fakhereh Pashaei, Mohammad R Ay, Alireza Amouheidari, Mohammad B Tavakoli
|
|
Peer-reviewed Journal Publication
|
|
Journal of medical signals and sensors, Vol 8 , P31-38
|
118.
Is correction for metallic artefacts mandatory in cardiac SPECT/CT imaging in the presence of pacemaker and implantable cardioverter defibrillator leads?
Zahra Etemadi, Pardis Ghafarian, Ahmad Bitarafan-Rajabi, Hadi Malek, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2018, Vol 26, P 35-46
|
119.
Quantification and Reduction of Respiratory Induced Artifact in Attenuation Correction of PET Data using Respiration Averaged CT: A Simulation and Phantom Study
Fatemeh Sadat Fatemi Nasrollahi, Pardis Ghafarian, Parham Grramifar, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies, 2017, Vol 3, pp 49-59
|
120.
Quantification and reduction of respiratory induced artifacts in positron emission tomography/computed tomography using the time-of-flight technique
Roya Sharifpour, Pardis Ghafarian, Arman Rahmim, Mohammad R Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear medicine communications
|
121.
A Generic, Scalable, and Cost-Effective Detector Front-End Block for PET
Salar Sajedi, Navid Zeraatkar, Mohsen Taheri, Sanaz Kaviani, Hadi Khanmohammadi, Saeed Sarkar, Hamid Sabet, MR Ay
|
|
Proceeding and Conference Record
|
|
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), P 1-3
|
122.
Development of a Preclinical PET System Based on Pixelated LYSO Crystals and SiPM Arrays
Navid Zeraatkar, Salar Sajedi, Sanaz Kaviani, Mohsen Taheri, Hadi Khanmohammadi, Saeed Sarkar, Mohammad Reza Ay
|
|
Proceeding and Conference Record
|
|
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), P 1-3
|
123.
A Comparison Study on Two Novel Statistical Reconstruction Algorithms Developed for Slit-Hole Collimation Data in Small Animal SPECT Imaging
H Mahani, G Raisali, A Kamali-Asl, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, P S434-S434
|
124.
Cardiac contraction motion compensation in gated Myocardial Perfusion SPECT
N Salehi, M Farahani, E Fatemizadeh, S Farzanefar, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
125.
Design optimization of partial cylindrical PET scanner based on trapezoid-shaped block detector and monolithic crystals using Monte Carlo simulation
P Sheikhzadeh, H Ghadiri, P Geramifar, P Ghaffarian, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
126.
Development of low dose CT protocols with acceptable CT image quality for CTAC of PET data: Phantom Study
Z Mojabi, P Ghafarian, H Ghadiri, M Bakhshayeshkaram, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
127.
Evaluation of the Impact of Using TOF Technique on Metal Artifact Reduction in PET/CT Images
R Sharifpour, P Ghafarian, MR Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
128.
Grid block design based on monte carlo simulated dosimetry, the linear quadratic and Hug–Kellerer radiobiological models
Somayeh Gholami, Hassan Ali Nedaie, Francesco Longo, Mohammad Reza Ay, Sharifeh A Dini, Ali S Meigooni
|
|
Peer-reviewed Journal Publication
|
|
Journal of medical physics, 2017, Vol 42, pp 213
|
129.
Is the averaged SUV from several hottest voxels an alternative to SUV peak for quantification of large heterogeneous or small lesions in oncological PET imaging?
A Ketabi, P Ghafarian, S Masjoodi, MA Mosleh-Shirazi, MR Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
130.
Monte Carlo Based Performance estimation of breast PET due to reduction of the ring diameter
A Emami, H Ghadiri, P Ghafarian, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
131.
Optimal quantitative SUV metrics over wide range of lesion sizes in advanced image reconstruction (TOF and PSF) for PET
I Shiri, P Ghafarian, S Ashrafinia, A Bitarafan-Rajabi, M Ay, A Rahmim
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, P S427-S428
|
132.
Optimization of the crystal thickness for a monolithic LYSO animal PET detector with anger and CSE positioning method using Monte Carlo simulation
A Sanaat, M Shamsaie, B Teymorian, R Hoshemi, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, p 431-432
|
133.
Quantification and Reduction of respiratory induced errors in attenuation correction of PET data using respiration averaged CT: a simulation study
P Ghaffarian, F Fatemi, P Geramifar, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017
|
134.
Simultaneous High-Sensitivity High-Resolution Molecular SPECT Imaging with Spinning Slit-Hole Collimator: A Monte Carlo Simulation Study
M Ay, H Mahani, G Raisali, A Kamali-Asl
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, P S389-S390
|
135.
Sub-centimeter lesion detectability in Point-spread function (PSF) and Time of flight (TOF) reconstructed PET images
I Shiri, P Ghafarian, A Bitarafan-Rajabi, M Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, P S438-S439
|
136.
The Influence of Crystal Material and Size on the Sensitivity of Recently Developed SiPM Based Animal PET Scanner: a Monte Carlo Study
P Ghahramani, N Zeraatkar, N Vosoughi, MR Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, PS429-S430
|
137.
Volume-based assessment of different image reconstruction algorithms and thresholds for FDG-PET/CT based on dose-painting concept
P Ghafarian, A Ketabi, MA Mosleh-Shirazi, MR Ay
|
|
Proceeding and Conference Record
|
|
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017, Vol 44, P S758-S758
|
138.
Compton scatter tomography in TOF-PET
Hamidreza Hemmati, Alireza Kamali-Asl, Mohammadreza Ay, Pardis Ghafarian
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine & Biology,2017, Vol 62, pp 7641
|
139.
Development and calibration of a new gamma camera detector using large square Photomultiplier Tubes
N Zeraatkar, S Sajedi, B Teimourian Fard, S Kaviani, A Akbarzadeh, MH Farahani, S Sarkar, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of Instrumentation,2017, Vol 12
|
140.
Development and validation of an accurate GATE model for NeuroPET scanner
Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Hojjat Mahani, Pardis Ghafarian, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Physica Medica, 2017,Vol.40, pp59-65
|
141.
Spinning slithole collimation for high-sensitivity small animal SPECT: Design and assessment using GATE simulation
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Physica Medica, 2017, Vol 40, pp 42-50
|
142.
Implementation of absolute quantification in small‐animal SPECT imaging: Phantom and animal studies
Shabnam Khorasani Gerdekoohi, Naser Vosoughi, Kaveh Tanha, Majid Assadi, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of applied clinical medical physics, 2017, Vol 18, pp 215-223
|
143.
How crystal configuration affects the position detection accuracy in pixelated molecular SPECT imaging systems?
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Science and Techniques, 2017, Vol 28, pp 47
|
144.
Implementation of absolute quantification in small-animal SPECT imaging: Phantom and animal studies
Shabnam Khorasani Gerdekoohi, Naser Vosoughi, Kaveh Tanha, Majid Assadi, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
MEDICAL IMAGING, 2017, pp 1-9
|
145.
Evaluation of radiation exposure to staff and environment dose from [18F]-FDG in PET/CT and cyclotron center using thermoluminescent dosimetry
S Zargan, P Ghafarian, A Shabestani Monfared, AA Sharafi, M Bakhshayeshkaram, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Journal of biomedical physics & engineering, 2017,Vol 7
|
146.
Quantification of the impact of TOF and PSF on PET images using the noise-matching concept: clinical and phantom study
M Shekari, P Ghafarian, S Ahangari, MR Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Science and Techniques, 2017, Vol 28, pp 167
|
147.
Collimator-Detector Response Compensation in Molecular SPECT Reconstruction using STIR Framework?
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine and Molecular Imaging, 2017, Vol 25, pp 26-34
|
148.
Impact of Time-of-Flight and Point-Spread-Function for Respiratory Artifact Reduction in PET/CT Imaging: Focus on Standardized Uptake Value
Roya Sharifpour, Pardis Ghafarian, Mehrdad Bakhshayesh-Karam, Hamidreza Jamaati, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Tanaffos ,2017,Vol 16, pp 127
|
149.
Monte Carlo optimization of crystal configuration for pixelated molecular SPECT scanners
Hojjat Mahani, Gholamreza Raisali, Alireza Kamali-Asl, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2017, Vol 844, pp 1-6
|
150.
Single STE-MR Acquisition in MR-Based Attenuation Correction of Brain PET Imaging Employing a Fully Automated and Reproducible Level-Set Segmentation Approach
Anahita Fathi Kazerooni, Mohammad Reza Ay, Saman Arfaie, Parisa Khateri, Hamidreza Saligheh Rad
|
|
Peer-reviewed Journal Publication
|
|
Molecular Imaging & Biology, 2017, Vol 19, pp 143-152
|
151.
A hybrid tracking system for image-guided spine surgery using a tracked mobile C-arm: a phantom study
P. Ghobadi, A. Ahmadian, H. saberi, M.R. Ay, M. Addolghafar and K. Amini
|
|
Peer-reviewed Journal Publication
|
|
Turk J Elec Eng & Comp Sci, 2017, Vol. 25, pp 434-448.
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152.
Development and Evaluation of Image Reconstruction Algorithms for a Novel Desktop SPECT System
Navid Zeraatkar, Arman Rahmim, Saeed Sarkar, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Asia Oceania Journal of Nuclear Medicine and Biology,2017, Vol 5,pp 120
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153.
New approach for calibration of pixelated scintillation detectors of
intraoperative gamma cameras
Afshin Akbarzadeh, Valiallah Saba, Mohammad Reza Ay
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Peer-reviewed Journal Publication
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Iranian Journal of Nuclear Medicine and Molecular Imaging, 2017, Vol. 25, No. 1, pp 34-42.
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154.
MR-guided attenuation map for prostate PET-MRI: an intensity and morphologic-based segmentation approach for generating a five-class attenuation map in pelvic region
M. Shandiz, H. Saligeh Rad, P. Ghafarian, M. Bakhshaysh Karam and M.R. Ay
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Peer-reviewed Journal Publication
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Ann Nucl Med. 2017, Vol 31, pp 29-39
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Abstract:
PURPOSE:
Prostate imaging is one of the major application of hybrid PET/MRI systems. Inaccurate attenuation maps (µ-maps) derived by direct segmentation (SEG) in which the cortical bone is ignored and the volume of the air in cavities is underestimated is the main challenge of commercial PET/MRI systems for the quantitative analysis of the pelvic region. The present study considered the cortical bone and air cavity along with soft tissue, fat, and background air in the µ-map of the pelvic region using a method based on SEG. The proposed method uses a dedicated imaging technique that increases the contrast between regions and a hybrid segmentation method to classify MR images based on intensity and morphologic characteristics of tissues, such as symmetry and similarity of bony structures.
PROCEDURES:
Ten healthy volunteers underwent MRI and ultra-low dose CT imaging. The dedicated MR imaging technique uses the short echo time (STE) based on the conventional sequencing implemented on a clinical 1.5T MRI scanner. The generation of a µ-map comprises the following steps: (1) bias field correction; (2) hybrid segmentation (HSEG), including segmenting images into clusters of cortical bone-air, soft tissue, and fat using spatial fuzzy c-means (SFCM), and separation of cortical bone and internal air cavities using morphologic characteristics; (3) the active contour approach for the separation of background air; and (4) the generation of a five-class μ-map for cortical bone, internal air cavity, soft tissue, fat tissue, and background air. Validation was done by comparison with segmented CT images.
RESULTS:
The Dice and sensitivity metrics of cortical bone structures and internal air cavities were 72 ± 11 and 66 ± 13 and 73 ± 10 and 68 ± 20 %, respectively. High correlation was observed between CT and HSEG-based µ-maps (R 2 > 0.99) and the corresponding sinograms (R 2 > 0.98).
CONCLUSIONS:
Currently, pelvis µ-maps provided by the current PET/MRI systems and the ultra-short echo time and atlas-based methods tend to be inaccurate. The proposed method acceptably generated a five-class μ-map using only one image.
KEYWORDS:
MRI-base attenuation correction; Morphologic characteristics-based segmentation; PET/MRI; Prostate imaging; STE pulse sequence
155.
Development and characterization of a compact hand-held
gamma probe system, SURGEOGUIDE, based on NEMA
NU3-2004 standards
S. Kaviani, N. Zeraatkar,S. Sajedi, N. Gorjizadeh, M.H. Farahani, P. Ghafarian,G. El Fakhri, H. Sabete and M.R. Ay
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Peer-reviewed Journal Publication
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Journal of Instrumentation, 2016, Vol 11
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156.
Effect of TOF and PSF in detection of lymph node metastases in head and neck of PET/CT images
P Ghafarian, A Ketabi, A Doroudinia, M Bakhshayesh Karam, MR Ay
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Proceeding and Conference Record
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EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2016, Vol 43, pp s507
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157.
Design and development of a dedicated portable gamma camera system for intra-operative imaging
S. Kaviani, N. Zeraatkar, S. Sajedi, A. Akbarzadeh, N. Gorjizadeh, M. H. Farahani, B. Teimourian, P. Ghafarian, H. Sabet and M.R. Ay
|
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Peer-reviewed Journal Publication
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|
Phys Med. 2016 Jul;32(7):889-97. doi: 10.1016/j.ejmp.2016.06.004. Epub 2016 Jun 23
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Abstract
PURPOSE:
We developed a high performance portable gamma camera platform dedicated to identification of sentinel lymph nodes (SLNs) and radio-guided surgery for cancer patients. In this work, we present the performance characteristics of SURGEOSIGHT-I, the first version of this platform that can intra-operatively provide high-resolution images of the surveyed areas.
METHODS:
At the heart of this camera, there is a 43×43 array of pixelated sodium-activated cesium iodide (CsI(Na)) scintillation crystal with 1×1mm(2) pixel size and 5mm thickness coupled to a Hamamatsu H8500 flat-panel multi-anode (64 channels) photomultiplier tube. The probe is equipped with a hexagonal parallel-hole lead collimator with 1.2mm holes. The detector, collimator, and the associated front-end electronics are encapsulated in a common housing referred to as head.
RESULTS:
Our results show a count rate of ∼41kcps for 20% count loss. The extrinsic energy resolution was measured as 20.6% at 140keV. The spatial resolution and the sensitivity of the system on the collimator surface was measured as 2.2mm and 142cps/MBq, respectively. In addition, the integral and differential uniformity, after uniformity correction, in useful field-of-view (UFOV) were measured 4.5% and 4.6%, respectively.
CONCLUSIONS:
This system can be used for a number of clinical applications including SLN biopsy and radiopharmaceutical-guided surgery.
Keywords:
Sentinel lymph node (SLN), Lymphoscintigraphy, SURGEOSIGHT-I, Breast cancer, Intra-operative gamma camera
158.
Design, optimization and performance evaluation of BM-PET: A simulation study
Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Pardis Ghafarian, Mohammad Reza Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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159.
Design and Assessment of a Novel SPECT System for Desktop Open-Gantry Imaging of Small Animals: a Monte Carlo Study
N. Zeraatkar, M. H. Farahani, S. Sarkar, A. Rahmim and M.R. Ay
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|
Peer-reviewed Journal Publication
|
|
Med Phys. 2016 May;43(5):2581. doi: 10.1118/1.4947127
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Abstract
PURPOSE:
Given increasing efforts in biomedical research utilizing molecular imaging methods, development of dedicated high-performance small-animal SPECT systems has been growing rapidly in the last decade. In the present work, we propose and assess an alternative concept for SPECT imaging enabling desktop open-gantry imaging of small animals.
METHODS:
The system, PERSPECT, consists of an imaging desk, with a set of tilted detector and pinhole collimator placed beneath it. The object to be imaged is simply placed on the desk. Monte Carlo (MC) and analytical simulations were utilized to accurately model and evaluate the proposed concept and design. Furthermore, a dedicated image reconstruction algorithm, finite-aperture-based circular projections (FABCP), was developed and validated for the system, enabling more accurate modeling of the system and higher quality reconstructed images. Image quality was quantified as a function of different tilt angles in the acquisition and number of iterations in the reconstruction algorithm. Furthermore, more complex phantoms including Derenzo, Defrise, and mouse whole body were simulated and studied.
RESULTS:
The sensitivity of the PERSPECT was 207 cps/MBq. It was quantitatively demonstrated that for a tilt angle of 30°, comparable image qualities were obtained in terms of normalized squared error, contrast, uniformity, noise, and spatial resolution measurements, the latter at ∼0.6 mm. Furthermore, quantitative analyses demonstrated that 3 iterations of FABCP image reconstruction (16 subsets/iteration) led to optimally reconstructed images.
CONCLUSIONS:
The PERSPECT, using a novel imaging protocol, can achieve comparable image quality performance in comparison with a conventional pinhole SPECT with the same configuration. The dedicated FABCP algorithm, which was developed for reconstruction of data from the PERSPECT system, can produce high quality images for small-animal imaging via accurate modeling of the system as incorporated in the forward- and back-projection steps. Meanwhile, the developed MC model and the analytical simulator of the system can be applied for further studies on development and evaluation of the system.
160.
Is Grid Therapy Useful for all Tumors and Every Grid Block Design?
S. Gholami, H. Nedaie, F. Longo, M. R. Ay, S. Wright and A. S. Meigooni
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|
Peer-reviewed Journal Publication
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J Appl Clin Med Phys. 2016 Mar 8;17(2):6015
|
Abstract
Grid therapy is a treatment technique that has been introduced for patients with advanced bulky tumors. The purpose of this study is to investigate the effect of the radiation sensitivity of the tumors and the design of the grid blocks on the clinical response of grid therapy. The Monte Carlo simulation technique is used to determine the dose distribution through a grid block that was used for a Varian 2100C linear accelerator. From the simulated dose profiles, the therapeutic ratio (TR) and the equivalent uniform dose (EUD) for different types of tumors with respect to their radiation sensitivities were calculated. These calculations were performed using the linear quadratic (LQ) and the Hug-Kellerer (H-K) models. The results of these calculations have been validated by comparison with the clinical responses of 232 patients from different publications, who were treated with grid therapy. These published results for different tumor types were used to examine the correlation between tumor radiosensitivity and the clinical response of grid therapy. Moreover, the influence of grid design on their clinical responses was investigated by using Monte Carlo simulations of grid blocks with different hole diameters and different center-to-center spacing. The results of the theoretical models and clinical data indicated higher clinical responses for the grid therapy on the patients with more radioresistant tumors. The differences between TR values for radioresistant cells and radiosensitive cells at 20 Gy and 10 Gy doses were up to 50% and 30%, respectively. Interestingly, the differences between the TR values with LQ model and H-K model were less than 4%. Moreover, the results from the Monte Carlo studies showed that grid blocks with a hole diameters of 1.0 cm and 1.25 cm may lead to about 19% higher TR relative to the grids with hole diameters smaller than 1.0 cm or larger than 1.25 cm (with 95% confidence interval). In sum-mary, the results of this study indicate that grid therapy is more effective for tumors with radioresistant characteristics than radiosensitive tumors.
161.
Reduction of Respiratory Induced Artefact in PET/CT Images using TOF Reconstruction
R. Sharif Pour, P. Ghafarian, A. Doroudinia, M. Bakhshayesh Karam and M. R. Ay
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|
|
ACNM 2016
|
Abstract
Objectives:
The aim of this study was to investigate the effect of time-of-flight (TOF) and point-spread function (PSF) for quantitative and qualitative PET/CT image analysis in relation to decrease respiratory artifact in diaphragmatic region.
Methods:
29 patients with uptake time 61±2 min and injection of 327.5 MBq (range 261–350 MBq) 18F-FDG were scanned with Discovery 690 GE PET/CT scanner, equipped with 64-slice CT. All of the lesions were in the diaphragmatic region including: the lung lower lobes, liver and stomach in patients with extended white band artefact. For quantitative measurement NEMA phantom were also utilized. The PET images were retrospectively reconstructed using HD (Fully 3D Iterative Reconstruction)+PSF and TOF+ PSF algorithm with various iterations, subsets and post smoothing filters. A semi-quantitative analysis was performed using SUVmax and SUVmean with 50% threshold. We also considered image quality using coefficient of variance (COV) in the liver in clinical study, the signal-to-noise ratio (SNR) and contrast to background measurements in each lesions. The PET/CT images reviewed by two expert physicians.
Results:
In the phantom study, SUVmean illustrated the more convenient value in related to SUVmax when TOF+PSF algorithm applied with increase of post filter from 4.4 mm to 6.4mm. In clinical study, the COV was decreased 7.4%±1.3% when TOF+PSF were compared with non-TOF image. The SUVmax trend to higher value with relative difference 11.3% (range: 0.5%–25.1%) when TOF and non-TOF images were evaluated. It was interesting that using appropriate TOF reconstruction parameter increased the SNR up 65.6% (Range: 7.0%–194.7%). The combination of TOF and PSF decreased the lesion size on PET images 33.0%, 25.7% and 24.5% in sagital, coronal and axial view respectively when compared with HD+PSF algorithm. According to balance among the SNR, contrast, noise and visual assessment, the optimal images were obtained with TOF+PSF with FWHM between 5.2 to 6.4 mm.
Conclusion:
A little overestimation in SUVmax versus to SUV mean 50% was observed, when PSF with combination of either VPHD or TOF was used. TOF with PSF improved white band artifact in diaphragmatic region remarkably, increased lesion delectability, and altered lesion size in PET images. It is noteworthy that the variation in SUV and lesion size is strongly dependent to the proximity of the lesions to the artefact region and it is highly recommended that to attain optimal image quality, combination of low iteration number and utilizing appropriate Gaussian filter is necessary because noise and false positive findings could be dominant with small-FWHM post filter.
162.
Hybrid Imaging, PET/CT, in HANDBOOK OF SMALL ANIMAL IMAGING, Preclinical Imaging, Therapy, and Applications
M.R. Ay and N. Ghazanfari
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|
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George C. Kagadis et al. , Editors. 2016, Tylor & Francis Books, Inc.
|
Mohammad Reza Ay and Nafiseh Ghazanfari
Introduction to Combining MRI with PET
163.
Introducing the HeliGuide: Urea Breath Tests System for Detecting Helicobacter Pylori
Aram Radnia, MohammadHossein Farahani, C Hoorvash, MohammadReza Ay
|
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Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,2015, Vol 2,pp 115-117
|
164.
How gamma camera’s head-tilts affect image quality of a nuclear scintigram?
Hojjat Mahani, Alireza Kamali-Asl, MohammadReza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies, 2015, Vol 1
|
165.
The influence of PET and CT misalignment due to respiratory motion on the cardiac PET/CT imaging: a simulation study
Pardis Ghafarian, MohammadReza Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies,2015, Vol 1
|
166.
Acceptance Test of the first Hospital Cyclotron for Production of PET tracers in Iran
P. Ghafarian, S. M. Khamesi1, M. R. Golrokh Nodehi and M. R. Ay
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|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 518
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167.
An alternate mathematical modeling of image formation, and framework for performance analysis of positioning algorithms in the scintillation camera
S. Hosseini, M. H. Farahani and M. R. Ay
|
|
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World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 103
|
168.
Can Pacemaker and ICD degrade CT-Based Attenuation Corrected cardiac SPECT images?
Z. Etemadi, A. Bitaran Rajabi, H. Malek, P. Ghafarian, N. Zeraatkar and M.R. Ay
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|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 132
|
169.
Correction of Metal Artefacts Induced from Pacemaker and ICD Leads in CT-Based Attenuation Correction of Cardiac SPECT data
M. R. Ay, Z. Etemadi, A. Bitarafan-Rajabi, H. Malek, N. Zeraatkar and P. Ghafarian
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 522
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170.
Design, modeling and performance evaluation of a small animal Micro-CT scanner: A Monte Carlo study
S. Nezhaddehghani1, S. Sarkar, and M. R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 97
|
171.
Generating a four-class attenuation map for MR-based attenuation correction of PET data in pelvis region using an automatic segmentation protocol
H. Saligheh Rad, M. Shirin Shandiz, P. Ghafarian, M. H. Arabi, M. Bakhshayeshkaram, N. Shafiei and M. R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 201
|
172.
Generation of 4-Class Attenuation Map for MRI Based Attenuation Correction of PET Data in the Head Area Using a Novel Combination of STE/DIXON-MRI and FCM Clustering
P. Khateri, H. Saligheh Rad, A. Homayoun Jafari, A. Fathi, A. Akbarzadeh, M. Shojae Moghadam, A. Aryan, P. Ghafarian and M.R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 371
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173.
Impact of Point spread function modeling on tumor quantification in clinical PET/CT imaging
S. Ahangari1, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 133
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174.
Measurement of Photon and Neutron Dose Distribution in Cyclotron Bunker During F18 and N13 Production
P. Ghafarian, S. M. Khamesi, M. R. Golrokh Nodehi and M.R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 606
|
175.
Monte Carlo Simulation of X-ray Spectra in Computed Tomography Scanner using GATE
M. R. Ay, S. Nezhaddehghani1, and S. Sarkar
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 331
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176.
Optimal Pixelated Crystal for a Molecular SPECT Scanner: A GATE Monte Carlo Study
M. R. Ay, H. Mahani, G. Raisali, and A. Kamali-Asl
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|
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World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 200
|
177.
Spinning Knife-Edge Slit-Hole: a Novel Collimation for High-Sensitivity Molecular SPECT
H. Mahani, G. Raisali, A. Kamali-Asl and M.R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 200
|
178.
The Impact of time of flight algorithm and PSF modeling on standard uptake value in clinical PET/CT imaging
M. Shekari, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 132
|
179.
TLD Measurement of Absorbed Dose of Workers in PET/CT Department
P. Ghafarian, S. Zargan, A. Shabestani Monfared, A. Sharafi, M. Bakhshayeshkaram and M.R. Ay
|
|
|
World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p109
|
180.
Generation of MR-Based Attenuation Correction Map of PET Images in the Brain Employing Joint segmentation of Skull ans Soft and Soft-Tissue from Single Short-0TE MR Imaging
Anahita Fathi Kazeroni, Mohammad Hadi Arabi, M.R.Ay
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Spring International Publishing Switzerland, 2015
|
181.
An optimal Grid block design for spatially fractionated radiation therapy
S. Gholami S , H. Nedaie, F. Longo, M. R. Ay, AS. Meigooni
|
|
|
ESTRO 2015
|
182.
Generation of a Four-Class Attenuation Map for MRI-Based Attenuation Correction of PET Data in the Head Area Using a Novel Combination of STE/Dixon-MRI and FCM Clustering
P. Khateri, H. Saligheh Rad, A. H. Jafari, A. Fathi Kazerooni, A. Akbarzadeh, M. Shojae Moghadam, A. Aryan, P. Ghafarian, M. R. Ay
|
|
Peer-reviewed Journal Publication
|
|
Mol Imaging Biol. 2015 Dec;17(6):884-92. doi: 10.1007/s11307-015-0849-1
|
Abstract
PURPOSE:
The aim of this study is to generate a four-class magnetic resonance imaging (MRI)-based attenuation map (μ-map) for attenuation correction of positron emission tomography (PET) data of the head area using a novel combination of short echo time (STE)/Dixon-MRI and a dedicated image segmentation method.
PROCEDURES:
MR images of the head area were acquired using STE and two-point Dixon sequences. μ-maps were derived from MRI images based on a fuzzy C-means (FCM) clustering method along with morphologic operations. Quantitative assessment was performed to evaluate generated MRI-based μ-maps compared to X-ray computed tomography (CT)-based μ-maps.
RESULTS:
The voxel-by-voxel comparison of MR-based and CT-based segmentation results yielded an average of more than 95 % for accuracy and specificity in the cortical bone, soft tissue, and air region. MRI-based μ-maps show a high correlation with those derived from CT scans (R (2) > 0.95).
CONCLUSIONS:
Results indicate that STE/Dixon-MRI data in combination with FCM-based segmentation yields precise MR-based μ-maps for PET attenuation correction in hybrid PET/MRI systems.
KEYWORDS:
Attenuation correction; Attenuation map; FCM technique; PET/MRI; STE pulse sequence
183.
Impact of the Radiation Sensitivity of Tumor and Geometric Design of the GRID Block On the Clinical Response of Grid Therapy
S. Gholami, AS. Meigooni, H. Nedaie, F. Longo M. R. Ay
|
|
|
Med. Phys. 42, 3440 (2015); http://dx.doi.org/10.1118/1.4924823
|
Abstract
Purpose:
The spatially fractionated radiation therapy (Grid therapy) is a novel technique that has been recently introduced for treatments of the patients with advanced bulky tumors. The purpose of this study is to investigate the effect of the radiation sensitivity of tumor and Grid block design on the clinical response of the Grid therapy.
Methods:
The Geant4 toolkit is used to simulate a Varian2100C linear accelerator with the block-based Grid. The dose profile has been utilized to calculate the Therapeutic Ratio (TR) and Equivalent Uniform Dose (EUD) for different types of tumors. These calculations were performed with respect to their radiation sensitivities using Linear Quadratic model (LQ). Clinical responses of few hundred patients from different publications that were treated with Grid therapy, have been used to validate correlation between tumor radiation sensitivity and clinical response of Grid therapy. Moreover, the influence of Grid design on clinical response of this radiation technique was investigated with using Monte Carlo simulation of a Grid block with different hole-diameters of 0.5 cm, 0.75 cm, 1.25 cm, and 1.5 cm. The Geometrical Sparing Factor (GSF) was considered to compare the results from different Grid designs.
Results:
The higher clinical response of Grid therapy for more radio-resistant tumors was confirmed in both theoretical assumptions and clinical outcomes. In addition, the results indicate that the Grid hole diameter have more effect on increasing the TR in comparison with the hole center-to-center distance effect. From this Monte Carlo study, a Grid design with the hole diameter between 1.25 cm and 1.5 cm with GSF value of 0.90 is recommended.
Conclusion:
Grid Therapy is more effective for more radio-resistant tumors.The optimum results of the Grid therapy depend on selection of the appropriate Grid design.This study is a first step toward clarifying some important aspects in a clinical response of spatially fractionated radiation therapy.
184.
Monte Carlo Calculation of Neutron Doses to Organs of a Female Undergoing A Pelvic 18 MV Irradiation
M. Zabihzadeh, S.R. Mahdavi, M.R. Ay and Z. Shakarami
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Peer-reviewed Journal Publication
|
|
Biomedical & Pharmacology Journal, 2015, Vol. 8, pp 65-71
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185.
Monte Carlo-based Assessment of the Trade-off between Spatial Resolution, Field-of-View and Scattered Radiation in the Variable Resolution X-ray CT Scanner
H. Arabi, A.R. Kamali Asl, M. R. Ay and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Phys Med, 2015, Vol. 31, pp 510-516
|
186.
Optimizing Image Reconstruction Parameters in Time of Flight PET/CT Imaging: a Phantom Study
M. Shekari, P. Ghafarian, S. Ahangari, H. Ghadiri, M. Bakhshayeshkaram and M.R. Ay
|
|
Peer-reviewed Journal Publication
|
|
2015, Vol. 2, No. 3, pp 146-154
|
187.
The Effects of Backscattered Radiation into Beam Monitor Chamber: Study of 6 and 18 MV Conventional and Removed Flattening Filter Clinical Accelerator
M. Zabihzadeh, S.R. Mahdavi, M.R. Ay and Z. Shakarami
|
|
Peer-reviewed Journal Publication
|
|
BIOSCIENCES BIOTECHNOLOGY RESEARCH ASIA, 2015, Vol. 12, pp 25-36
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188.
The Impact of Point Spread Function Modeling on Scan Duration in PET Imaging
S. Ahangari, P. Ghafarian, M. Shekari, H. Ghadiri, M. Bakhshayeshkaram and M.R. Ay
|
|
Peer-reviewed Journal Publication
|
|
Frontiers in Biomedical Technologies, 2015, Vol. 2, No. 3, pp 137-145
|
189.
Design and development of small fieldof view portable gamma camera for localization of sentinel lymph nodes
V. Moji, N. Zaratkar, S. Sajedi, A. Akbarzadeh, B. Timourian, M.H. Farahani and M. R. Ay
|
|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 70
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190.
Development of a hybrid small animal SPECT/CT scanner:a Monte Carlo study
S. Nerzhaddehghani, S. Sarkar and M.R. Ay
|
|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 71
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191.
Experimental measurement of absorbed dose using TLD for radiation workers in PET/CT department
S. Zargan, A. Monfared, P. Ghafarian, A. K. Sharafi, M. Bakhshayesh karam and M.R. Ay
|
|
|
18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 157
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192.
Monte Carlo-based characterization of HiReSPECT scanner: a dedicatd small animal SPECT imaging system
H. Mahani, G. Raisali, A. Kamali asl and M.R. Ay
|
|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 73
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193.
Optimizing the acquisition time in whole body PET/CT imaging
S. Ahanghari, P. Ghafarian, M. Sherkari, M. Bakhshayesh karam and M.R. Ay
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|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 75
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194.
Performance evaluation of surgical gamma probe for sentinel lymph node localization based on NMA NU3-2004 standard
N. Gorjizadeh, S. Farzanehfar, A. Kaviani, N. Zeraatkar, M. H. Farhani, S. Sajesi and M.R. Ay
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|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 77
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195.
Quantification of inter-crystal scatter and penetration in HiReSPCT: a dedicated small animal SPCT imaging systm
H. Mahani, G. Raisali, A. Kamali asl and M.R. Ay
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|
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18th Iranian Conference of Nuclear Medicine, Tehran, Iran, 12-14 November 2104, pp. 78
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196.
A Fully Automated and Reproducible Level-set Segmentation Approach for Generation of MR-Based Attenuation Correction Map of PET Images in the Brain Employing Single STE-MR Imaging Modality
Fathi, M. H. Arbabi, M.R. Ay and H. Saligheh Rad
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|
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PSMR 2014 MR-PET Workshop, Kos Island, Greece, 19-21 May 2014, EJNMMI Physics 2014, 1(Suppl 1):A48
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197.
A hybrid method for generation of attenuation map for MR-based attenuation correction of PET data in prostate PET/MR imaging
M. Shirin Shandiz, M. H. Arabi, P. Ghafarian, M. Bakhshayesh Karam , H. Saligheh Rad and M.R. Ay
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PSMR 2014 MR-PET Workshop, Kos Island, Greece, 19-21 May 2014, EJNMMI Physics 2014, 1(Suppl 1):A77
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198.
MR-Based Attenuation Map Generation in Short-TE MR Images of the Head Employing Spatial Fuzzy C-Means Clustering Approach
M. H. Arabi, A. Fathi, P. Khateri, M.R. Ay and H. Saligheh Rad
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PSMR 2014 MR-PET Workshop, Kos Island, Greece, 19-21 May 2014, EJNMMI Physics 2014, 1(Suppl 1):A49
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199.
A Novel Segmentation Approach for Implementation of MRAC in Head PET/MRI Employing Short-TE MRI and 2-Point Dixon Method in a Fuzzy C-Means Framework
P. Khateri, H. Saligeh Rad, A.H. Jafari and M.R. Ay
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Peer-reviewed Journal Publication
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Nuclear Instrumentation Methods in Physics Research A, 2014, Vol. 734, No. 8, pp 171-174
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200.
Classification of bones from MR images in torso PET-MR imaging using a statistical shape model
M. R. Ay, A. Akbarzadeh, A. Ahmadian and H. Zaidi
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Peer-reviewed Journal Publication
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Nuclear. Instrumentation Methods in Physics Research A, 2014, Vol. 734, pp 196-200
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Abstract
There have been exclusive features for hybrid PET/MRI systems in comparison with its PET/CT counterpart in terms of reduction of radiation exposure, improved soft-tissue contrast and truly simultaneous and multi-parametric imaging capabilities. However, quantitative imaging on PET/MR is challenged by attenuation of annihilation photons through their pathway. The correction for photon attenuation requires the availability of patient-specific attenuation map, which accounts for the spatial distribution of attenuation coefficients of biological tissues. However, the lack of information on electron density in the MR signal poses an inherent difficulty to the derivation of the attenuation map from MR images. In other words, the MR signal correlates with proton densities and tissue relaxation properties, rather than with electron density and, as such, it is not directly related to attenuation coefficients. In order to derive the attenuation map from MR images at 511 keV, various strategies have been proposed and implemented on prototype and commercial PET/MR systems. Segmentation-based methods generate an attenuation map by classification of T1-weighted or high resolution Dixon MR sequences followed by assignment of predefined attenuation coefficients to various tissue types. Intensity-based segmentation approaches fail to include bones in the attenuation map since the segmentation of bones from conventional MR sequences is a difficult task. Most MR-guided attenuation correction techniques ignore bones owing to the inherent difficulties associated with bone segmentation unless specialized MR sequences such as ultra-short echo (UTE) sequence are utilized. In this work, we introduce a new technique based on statistical shape modeling to segment bones and generate a four-class attenuation map. Our segmentation approach requires a torso bone shape model based on principle component analysis (PCA). A CT-based training set including clearly segmented bones of the torso region of 20 clinical studies was designed. Using this training set, a bone atlas was trained taking advantage of PCA analysis. Our active shape segmentation technique uses the trained shape model to segment bones from user defined initial seed points. The segmentation algorithm was evaluated using 10 clinical datasets (aligned MR and CT pairs). The resulting attenuation maps were compared to corresponding attenuation maps derived from CT resulting in a mean relative difference less than 7%.
Keywords:
PET/MRI; MR bone segmentation; Attenuation correction; Whole-body imaging
201.
Derivation of attenuation map for attenuation correction of PET data in the presence of nanoparticulate contrast agents using spectral CT imaging
H. Ghadiri, MB Shiran, HR Soltanian-Zadeh, A. Rahmim, H. Zaidi and M.R. Ay
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Peer-reviewed Journal Publication
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Annals of Nuclear Medicine, 2014, Vol. 28, No. 6, pp 559-570
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202.
Design and Development of a High Resolution Animal SPECT Scanner Dedicated for Rat and Mouse Imaging
S. Sajedi , N. Zeraatkar, V. Moji, M. H. Farahani, S. Sarkar, H. Arabi, B. Teymoorian, P. Ghafarian, A. Rahmim and M.R. Ay
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Peer-reviewed Journal Publication
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Nuclear. Instrumentation Methods in Physics Research A, 2014, Vol. 741, pp 169-176
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203.
Experimental Evaluation of the Performance of HiReSPECT Scanner: a High-Resolution SPECT System for Small Animal Imaging
A. M. Pashazadeh, K. Tanha, F. Jafarian Dehkordi, M. Assadi, V. Moji , N. Zeraatkar and M.R. Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies, 2014, Vol. 1, No. 3, pp 222-227
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204.
How Gamma Camera’s Head-Tilts Affect Image Quality of a Nuclear Scintigram?
H. Mahani, A. Kamali-Asl, M.R. Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies, 2014, Vol. 1, No. 4, pp 265-270
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205.
Performance Evaluation of Newly Developed High Resolution Dual Head Animal SPECT System Based on NEMA NU2 2007 Standard
V. Moji, N. Zeraatkar, M.H. Farahani, M. Aghamiri, S. Sajedi, B. Teymorian, P. Ghafarian , S. Sarkar and M.R. Ay
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Peer-reviewed Journal Publication
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J Appl Clin Med Phys, 2014, Vol. 15, No. 6, pp 267-278
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206.
Positron Emission Tomography: Physics, Instrumentation, Scanners and New Horizons
M.R. Ay and P. Geramifar
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2014, Royan Pazhoh, Inc., Tehran, Iran, ISBN-13: 9786007108543
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207.
Quantification of PET and CT misalignment errors due to bulk motion in cardiac PET/CT imaging: Phantom and clinical studies
P. Ghafarian, M.R. Ay, A. Fard-Esfahani, A. Rahmim and H. Zaidi
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies, 2014, Vol. 1, No. 3, pp 159-167
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208.
Resolution-Recovery-Embedded Image Reconstruction for a High-Resolution Animal SPECT System
N. Zeraatkar, S. Sajedi, M. H. Farahani, H. Arabi, S. Sarkar, P. Ghafarian, A. Rahmim and M.R. Ay
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Peer-reviewed Journal Publication
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Phys Med, 2014, Vol. 30, No. 7, pp 774-781
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209.
The Influence of PET and CT Misalignment due to Respiratory Motion on the Cardiac PET/CT Imaging: a Simulation Study
P. Ghafarian, M.R. Ay
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Peer-reviewed Journal Publication
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Frontiers in Biomedical Technologies, 2014, Vol. 1, No. 4, pp 252-257
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210.
Optical Flow Based Method for Generation of Virtual Average CT: A Simulation Study Using 4D XCAT Phantom
P. Geramifar, M. Shamsaie Zafarghandi and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, Vol 20, Issue 2
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211.
Performance Evaluation of a Small Field of View Portable Gamma Camera for Localization of Sentinel Lymph Nodes
N. Gorjizadeh, N. Zeraatkar, A. Kaviani, S. Farzaneh far, M. H. Farahani, A. Akbarzadeh, S. Sajedi, B. Teimourian and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, Vol 20, Issue 2
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212.
SURGEOGUIDE: a Gamma Probe for Localization of Sentinel Lymph Nodes
M.R. Ay, N. Zeraatkar, N. Gorjizadeh, S. Sajedi, H. Arabi, M. H. Farahani, B. Teimourian
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European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, Vol 20, Issue 2
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213.
The Influence of Misalignment Artifact Due to Global and Respiratory Motion on Interpretation of Cardiac PET/CT Examination: Clinical and Phantom Studies
P. Ghafarian and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, , Vol 20, Issue 2
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214.
Variation in Thoracic Lesions SUVmax as a Function of Respiratory Phase Based on the Optical Flow Motion Estimation: A Simulation Study Using 4D XCAT Phantom
P. Geramifar, M. Shamsaie Zafarghandi and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, Vol 20, Issue 2
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215.
K-edge ratio method for identification of multiple nanoparticulate contrast agents by spectral CT imaging
H Ghadiri, M. R. Ay , M. B. Shiran, H. R. Soltanian-Zadeh and H Zaidi
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Peer-reviewed Journal Publication
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Br J Radiol. 2013 Sep; 86(1029): 20130308
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216.
A fast and hardware mimicking analytic CT simulator
H Ghadiri, M B Shiran, H R Soltanian-Zadeh, A Rahmim and M R Ay
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Proceeding and Conference Record
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Seoul, South Korea, 2013, pp 1-5
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Abstract:
Different algorithms have been utilized for x-ray computed tomography (CT) simulation based on Monte Carlo technique, analytic calculation, or combination of them. Software packages based on Monte Carlo algorithm provide sophisticated calculations but the time consuming nature of them limits its applicability. Analytic calculation for CT simulation has been also evaluated in recent years. Due to ignoring basic physical processes, analytic methods have limited applications. In this study, a hardware mimicking algorithm has been developed to accurately model the CT imaging chain using analytic calculation. The model includes x-ray spectrum generation according to the pre-defined scanning protocol. The detector is designed to acquire the data either in integral or spectral modes. CT geometry can be used as parallel or fan beam with different sizes. Poisson noise model was applied to the acquired projection data. Varieties of projection-based computerized phantoms have been designed and implemented in the simulator. CT number and background noise of the simulated images have been compared with experimental data. On average, the relative difference between simulated and experimental HUs are 8.3%, 7.5%, and 8.0% for bone; 12.1%, 10.3%, and 7.8% for contrast agent; and 16.6%, 3.6%, and 5.2% for the background at 80 kVp/500 mAs, 120 kVp/250 mAs, and 140 kVp/125 mAs, respectively. The relative difference between simulated and experimental noise values vary between 2% to slightly less than 26%. For scanning and image generation with a computer equipped with Intel Core2 Quad CPU and 2.0 GB of RAM, the simulator takes about 32 seconds for generating a 512×512 single slice image when it is adjusted to acquire 900 projection angles with 20 mm slice thickness and 140kVp/200 mAs scanning protocol. The simulation time is independent of photon intensity.
217.
A Novel Segmentation Approach for Implementation of MRAC in Head and Neck PET/MRI Imaging Employing Short-TE MRI and 2-Point Dixon Method in Fuzzy C-Means Framework
P. Khateri, H. Salighe Rad, A.H. Jafari and M.R. Ay
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PSMR 2013 MR-PET Workshop, Jülich, Germany, 6-7 May –2013
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218.
Classification of bones from MR images in torso PET-MR imaging using a statistical shape model
M.R. Ay, Akbarzadeh A, Ahmadian and Zaidi H
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PSMR 2013 MR-PET Workshop, Jülich, Germany, 6-7 May –2013
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219.
A new energy mapping algorithm based on spectral CT images: application in PET/CT attenuation correction
H. Ghadiri, M.B. Shiran, H.R. Soltanian-Zadeh and M.R. Ay
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Iranian Congress of Nuclear Medicine, Shiraz, Iran, May 1-3, 2013
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220.
Performance evaluation of HiReSPECT a dedicated animal SPECT system using modified NEMA standards
V.Moji, M. Aghamiri, H. Farahani, N. Zeratkar, S. Sajedi, B. Teymorian and M.R. Ay
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Iranian Congress of Nuclear Medicine, Shiraz, Iran, May 1-3, 2013
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221.
Spatial Resolution and System Sensitivity in a Tilted-Head Planar-SPECT: a Monte Carlo Study
H. Mahani, A. R. Kamali-Asl, V. Moslemi, M.R. Ay
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Iranian Congress of Nuclear Medicine, Shiraz, Iran, May 1-3, 2013
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222.
3D Prior Image Constrained Projection Completion for X-ray CT Metal Artifact Reduction
A. Mehranian, M. R. Ay, A. Rahmim and H. Zaidi
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Peer-reviewed Journal Publication
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IEEE Trans Nuclear Sciences, 2013, Vol. 60, No. 5, pp 3318-3332
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223.
A novel non-linear recursive filter design for extracting high rate pulse features in nuclear medicine imaging and spectroscopy
S. Sajedi, A. Kamali Asl, M. R. Ay, M.H. Farahani and A. Rahmim
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Peer-reviewed Journal Publication
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Medical Engineers & Physics , 2013, Vol. 35, No.6, pp. 754-764
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224.
An ordered-subsets proximal preconditioned gradient algorithm for edge-preserving PET image reconstruction
A. Mehranian, A. Rahmim, M. R. Ay, F. Kotasidis and H. Zaidi
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Peer-reviewed Journal Publication
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Medical Physics 2013, Vol. 40, No. 5, pp 052503-14
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225.
EBT GHAFCROMIC film dosimetry in compensator-based intensity modulation radiation therapy
S. Vaezzadeh, M. Allahverdi, H. Nedaei, M. R. Ay, A. Shirazi and M. Yarahmadi
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Peer-reviewed Journal Publication
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Medical Dosimetry , 2013, Vol. 38, pp. 176-183
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226.
Evaluation of whole-body MR to CT deformable image registration
A. Akbarzadeh, D. Gutierrez, A. Baskin, M. R. Ay, A. Ahmadian, N. Riahi Alam, K. Lövblad and H. Zaidi
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Peer-reviewed Journal Publication
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J Appl Clin Med Phys, 2013, Vol. 14, No. 4, pp 238-253
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227.
Experimental assessment of the influence of beam hardening filters on image quality and patient dose in volumetric 64-slice x-ray CT scanners
M. R. Ay, A. Mehranian, A. Maleki, H. Ghadiri,P. Ghafarian and H. Zaidi
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Peer-reviewed Journal Publication
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Phys Med , 2013, Vol. 29, pp. 249-260
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228.
MRI-guided attenuation correction in whole-body PET/MR: Assessment of the effect of bone attenuation
A. Akbarzadeh, M. R. Ay, A. Ahmadian, N. Riahi Alam and H. Zaidi
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Peer-reviewed Journal Publication
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Annals of Nuclear Medicine, 2013, Vol. 27, pp. 152-162
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229.
Respiratory-Induced Errors in Tumor Quantification and Delineation in CT Attenuation Corrected PET Images: Effects of Tumor Size, Tumor Location and Respiratory Trace - A Simulation Study Using the 4D XCAT Phantom
P. Geramifar, M. Shamsaie Zafarghandi, P. Ghafarian, A. Rahmim and M. R. Ay
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Peer-reviewed Journal Publication
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Molecular Imaging & Biology, 2013, Vol. 15, No. 6, pp 655-665
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230.
Smoothly Clipped Absolute Deviation (SCAD) Regularization for Compressed Sensing MRI Using an Augmented Lagrangian Scheme
A. Mehranian, H. Salighe Rad, A. Rahmim, M. R. Ay and H. Zaidi
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Peer-reviewed Journal Publication
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Magnetic Resonance Imaging, 2013, Vol. 31, No. 8, pp 1399-1411
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231.
X-ray CT metal artifact reduction using wavelet domain L0 sparse regularization
A. Mehranian, M. R. Ay, A. Rahmim and H. Zaidi
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Peer-reviewed Journal Publication
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IEEE Trans Med Imaging, 2013, Vol. 32, No. 9, pp 1707-1722
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232.
An Innovative Rotation-Based Iterative Resolution Recovery for HiReSPECT™: a Dedicated Small Animal SPECT System
N. Zeraatkar, M. H. Farahani, H. Arabi, S. Sarkar, S. Sajedi, N. Naderi, P. Ghafarian, A. Rahmim and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S386-S387
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233.
Design and Development of a High Resolution Small Animal Imaging System for Mice and Rat
M.R. Ay , H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajed, N. Naderi and P. Ghafaian
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S441
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234.
Determination of Attenuation Map at 511 keV Employing 3D Short Echo-Time MR Imaging in the Head Area: Application in MR-Based AC of PET data
P. Khareti, H. Salighe Rad, and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S369
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235.
Digital signal processing unit for nuclear detection system
S. Sajedi, M.R. Ay, M. H. Farahani, N. Zeraatkar, H. Arabi, and N. Naderi
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S498
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236.
Evaluation of the influence of respiratory motion misalignment between PET and CT data on diagnosis of heart defects using 4D XCAT phantom and STIR reconstruction
M. Sedighpoor, P. Ghafarian, A. Emami, M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S515
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237.
Quantification of the influence of misregistration between CT and SPECT images on the accuracy of CT-based attenuation correction of cardiac images in hybrid SPECT/CT systems
L. Saleki, A. Bitarafan-Rajabi, N. Yaghobi, B. Falahi, and M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S518
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238.
Standardized Uptake Value-Based Evaluations of Respiratory-Induced Errors in CTAC PET Images: A Simulation Study Using 4D XCAT Phantom
P. Geramifar, M. Shamsaie Zafarghandi, M.R. Ay
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S403
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239.
SURGEOSIGHT-TM: An Intraoprative Hand Held Gamma Camera for Precise Localization of Sentine Lymph Nodes
M.R. Ay , H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajed, N. Naderi and P. Ghafaian
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S385
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240.
The influence of crystal material and size on the performance of partial-rotating dual head small animal PET scanners: Quantitative evaluation using Monte Carlo modeling
N. Ghazanfari, M.R. Ay, S.Sarkar and G.Loudos
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S442
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241.
The influence of resolution recovery during image reconstruction on quantitative brain SPECT imaging
A. Emami-Ardekani, F. Kalantari, H. Rajabi, M.R. Ay, A. Fard, M. Eftekhari
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European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S500
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242.
Smoothly Clipped Absolute Deviation (SCAD) Regularization for Compressed Sensing MRI Using an Augmented Lagrangian Scheme
Mehranian A, H. Salighe Rad, M.R. Ay , Rahmim A, and Zaidi H
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Proceeding and Conference Record
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Anaheim, CA, USA, 2012, pp 3646-3653
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Abstract:
Compressed sensing (CS) in magnetic resonance imaging (MRI) enables the reconstruction of MR images from highly undersampled k-spaces, and thus substantial reduction of data acquisition time. In this context, edge-preserving and sparsity-promoting regularizers are used to exploit the prior knowledge that MR images are sparse or compressible in a given transform domain and thus to regulate the solution space. In this study, we introduce a new regularization scheme by iterative linearization of the non-convex clipped absolute deviation (SCAD) function in an augmented Lagrangian framework. The performance of the proposed regularization, which turned out to be an iteratively weighted total variation (TV) regularization, was evaluated using 2D phantom simulations and 3D retrospective undersampling of clinical MRI data by different sampling trajectories. It was demonstrated that the proposed regularization technique substantially outperforms conventional TV regularization, especially at reduced sampling rates.
243.
Generation of attenuation map for MR-based attenuation correction of PET data in the head area employing 3D short echo time MR imaging
P. Khareti, H. Salighe Rad, A. Fathi and M.R. Ay
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Proc. PSMR Conference, Isola de Elba, Italy 26-30 May , p. 70, 2012
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244.
3D Calculation of Absorbed Dose for 131I Targeted Radiotherapy: A Monte Carlo Study
E. Saeedzadeh, S. Sarkar, A. Abbaspour Tehrani-Fard, M.R. Ay, H.R. Khosravi, G. Loudos
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Peer-reviewed Journal Publication
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Radiation Protection Dosimetry, 2012, 150, pp. 298-305
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245.
3D TV-Based Compressed MR Image Reconstruction Using a Primal Dual Algorithm
A. Mehranian, H. S. Rad, M.R. Ay, and A. Rahmim
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Proc. Intl. Soc. Mag. Reson. Med., vol. 20, pp. 4228, 2012
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246.
A novel energy mapping approach for CT-based attenuation correction in PET
B. Teimourian , M. R. Ay, M. Shamsaei-Zafarghandi, P. Ghafarian, H. Ghadiri and H. Zaidi
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Peer-reviewed Journal Publication
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Med Phys 2012, Vol. 39, No. 4, pp 2078-2089
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247.
A proximal splitting algorithm for TV-regularized PET image reconstruction
A. Mehranian, A. Rahmim, and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 43, 2012
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248.
An Ordered-Subsets Proximal Preconditioned Gradient Algorithm for Total Variation Regularized PET Image Reconstruction
Mehranian A, M.R. Ay, Rahmim A, and Zaidi H
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Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Anaheim, CA, USA, 2012, pp 3375-3382
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249.
Development of a fully 3D image reconstruction for a pinhole animal SPECT
M. Khamesi, A. Kamali Asl, M. Masoudi, N. Zeraatkar, and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 122, 2012
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250.
Development of image reconstruction code with collimator-detector response function compensation for a preclinical SPECT scanner
N. Zeraatkar, M. H. Farahani, H. Arabi, S. Sarkar, S. Sajedi, A. Rahmim, and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 36, 2012
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251.
Generalized 4D AB-OSEM direct parametric imaging: application to PiB-PET
A. Rahmim, Y. Zhou, J. Price, J. Tang, L. Lu, M.R. Ay, G. Smith, V. Sossi, and D. Wong
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|
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J. Nucl. Med., vol. 53 (suppl. 1): 313, 2012
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252.
Generation of attenuation map for MR-based attenuation correction of PET data in the head area employing 3D short echo time MR imaging
P. Khateri, H. Saligeh Rad, A, Fathi and M.R. Ay
|
|
Peer-reviewed Journal Publication
|
|
Nuclear. Instrumentation Methods in Physics Research A, 2012, Vol. 702, No.21, pp. 133-136
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253.
High resolution small animal SPECT: HiReSPECT for preclinical imaging
H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajedi, A. Rahmim, P. Ghafarian and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 93, 2012
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254.
HiReSPECT an in house high resolution SPECT imaging system
M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 10, 2012
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255.
Impact of miscentering on patient dose and image noise in x-ray CT imaging: Phantom and clinical studies
M.A. Habibzadeh, M.R. Ay, A.R. Kamali Asl, H. Ghadiri and H. Zaidi H
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|
Peer-reviewed Journal Publication
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|
Phys Med Vol. 28, 2012, pp. 191-199
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256.
Implementation of data acquisition board with digital signal processing capability for nuclear imaging and spectrometry devices
S. Sajedi, M. H. Farahani, H. Arabi, N. Zeraatkar, and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 39, 2012
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257.
QCT technique optimization by dual energy CT
A. Emami, H. Ghadiri, P. Ghafarian and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 125, 2012
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258.
Quantification of the influence of respiratory motion induced misalignment between PET and CT data on diagnosis of heart disease in cardiac PET/CT imaging
M. Sedigpoor, M.R. Ay, P. Ghafarian, P. Farnia
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 129, 2012
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259.
Quantitative assessment of the influence of crystal material and size on the performance of rotating dual head small animal PET scanners: Monte Carlo modeling
N. Ghazanfari, S. Sarkar, G. Loudos, M.R. Ay
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Peer-reviewed Journal Publication
|
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Hellenic Journal of Nuclear Medicine, 2012, Vol. 15, No. 1, pp. 33-39
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260.
The accuracy of dual energy mapping approach in CTAC in presence of low concentration of contract agent
H. Ghadiri, M.B. Shiran, H. Zaidi, H. Soltanian Zadeh and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 60, 2012
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261.
The influence of opening angels and collimator material on the spatial resolution of pinhole collimator in animal SPECT imaging
M. Masoudi, A. Kamali Asl, M. Khamesi, H. Arabi and M.R. Ay
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Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 122, 2012
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262.
The infuence of resolution recovery by using collimator detector response during 3D OSEM image reconstruction on 99mTc-ECD brain SPET images
F. Kalantari, H. Rajabi, M. R. Ay, A. Fard Esfahani, M. Eftekhari, B. Fallahi, A. Emami Ardekani
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Peer-reviewed Journal Publication
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Hellenic Journal of Nuclear Medicine, 2012, Vol. 15, No. 2, pp. 91-96
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263.
A novel energy mapping approach in CT-based attenuation correction of PET data using multi-energy CT imaging
Ghadiri H, Shiran MB, M.R. Ay, Soltanian-Zadeh H and Zaidi H
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|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 2510-2515
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264.
A Novel Phantom for Accurate Performance Assessment of Bone Mineral Measurement Techniques: DEXA and QCT
A. Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, A. Eslami, P. Ghafarian and S. Taghizadeh
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|
Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 3441-3445
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265.
Characterization of scattered radiation profile in volumetric 64-slice x-ray CT scanner: A Monte Carlo study
Najafi Darmian A, M.R. Ay, Ghafarian P, Pouladian M, Shirazi A, Ghadiri H, Akbarzadeh A and Zaidi H
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|
Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 2692–2696
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266.
Generalized inter-frame and intra-frame motion correction in dynamic PET imaging
H. Mohy-ud-Din, N. Karakatsanis, C. Endres, M. R. Ay, D. F. Wong, and A. Rahmim
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Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 3858-3862
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267.
Impact of tissue classification on the accuracy of MR-based attenuation correction in PET-MRI
Akbarzadeh A, M.R. Ay, Ahmadian A, Riahi Alam N and Zaidi H
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|
Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 2524–2530
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268.
Metal artifact reduction in CT-based attenuation correction of PET using Sobolev sinogram restoration
Mehranian A, M.R. Ay, Rahmim A and Zaidi H
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|
Proceeding and Conference Record
|
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IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, P. 2936-2942
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269.
Sparsity constrained sinogram inpainting for metal artifact reduction in x-ray computed tomography
Mehranian A, M.R. Ay , Rahmim A, and Zaidi H
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 3694–3699
|
270.
B-spline based free form deformation thoracic non-rigid registration of CT and PET images
Khodadad D, Ahmadian A, M.R. Ay, Esfahani AF, Banaem HY and Zaidi H
|
|
Proceeding and Conference Record
|
|
International Conference on Graphic and Image Processing (ICGIP 2011), 1-3 October 2011, Cairo, Egypt, Proc. SPIE, Vol. 8285, pp 82851K
|
271.
A Novel Phantom for Accurate Performance Assessment of Bone Mineral Measurement Techniques: DEXA and QCT
A. Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, A. Eslami, P. Ghafarian and S. Taghizadeh
|
|
Proceeding and Conference Record
|
|
5th Kuala Lumpur International Conference on Biomedical Engineering, 20-23 June 2011, Kuala Lumpur, Malaysia, IFMBE Proceedings 35, p. 47-50
|
272.
Monte Carlo Characterization of Scattered radiation profile in Volumetric 64 slice CT using GATE
A. Najafi Darmian, M.R. Ay, M. Pouladian, A. Shirazi, H.Ghadiri and A. Akbarzadeh
|
|
Proceeding and Conference Record
|
|
5th Kuala Lumpur International Conference on Biomedical Engineering, 20-23 June 2011, Kuala Lumpur, Malaysia, IFMBE Proceedings 35, p. 694-697
|
273.
Quantification of Inter-crystal Scattering and Parallax Effect in Pixelated High Resolution Small Animal Gamma Camera: A Monte Carlo Study
F. Adibpour, M.R. Ay, S. Sarkar and G. Loudos
|
|
Proceeding and Conference Record
|
|
5th Kuala Lumpur International Conference on Biomedical Engineering, 20-23 June 2011, Kuala Lumpur, Malaysia, IFMBE Proceedings 35, p. 708-711
|
274.
Quantitative Assessment of the influence of crystal material and size on the Inter Crystal Scattering and Penetration effect in pixilated dual head small animal PET scanner
N. Ghazanfari, M.R. Ay, N. Zeraatkar, S. Sarkar and G. Loudos
|
|
Proceeding and Conference Record
|
|
5th Kuala Lumpur International Conference on Biomedical Engineering, 20-23 June 2011, Kuala Lumpur, Malaysia, IFMBE Proceedings 35, p. 712-715
|
275.
Accurate Monte Carlo modeling and performance assessment of the X-PET™ subsystem of the FLEX Triumph™ preclinical PET/CT scanner
N. Zeratkar, M.R. Ay, A Kamaliasl and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 2011, Vol. 38, No 3, pp 1217-1225
|
276.
Assessment of the impact of applying attenuation correction on the accuracy of activity recovery in TC99m-ECD brain SPECT of healthy subject using statistical parameter mapping
F. Vedaei, M.R. Ay, A. Kamali asl, F. Kalantari
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|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 92
|
277.
Assessment of the impact of applying attenuation correction on the accuracy of activity recovery in Tc99m-ECD brain SPECT of healthy subject using Statistical Parametric Mapping (SPM)
F. Vedaei, A. Kamali asl, F. Kalantari, M. Ansari, M.R. Ay
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2011, 19, pp. 52-59
|
278.
Assessment of the influence of crystal material and size on the performance of dual head small animal PET scanners
N. Ghazanfari, M.R. Ay, S. Sarkar and G. Lodous
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 108
|
279.
Bone material decomposition by energy resolved CT-based attenuation correction of PET
H. Ghadiri, M. Shiran, M.R. Ay, H. Zaidi, H. Soltanian Zadeh
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 98
|
280.
Comparative assessment of energy-mapping approaches in CT-based attenuation correction for PET
M. R. Ay, M. Shirmohammad, S. Sarkar, A. Rahmim, H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Molecular Imaging & Biology, 2011, Vol. 13, pp. 187-198
|
281.
Correction of contrast agent induced srtifacts in CT-based attenuation correction of cardiac PET data using a semi-automated segmentation algorithm
P. Ghafarian, M.R. Ay and J. Hassani
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 110
|
282.
CT-based attenuation correction on the FLEX Triumph™ preclinical PET/CT scanner
R. Prasad, M.R. Ay, O. Ratib and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
IEEE Trans Nuclear Sciences, 2011, Vol. 58 pp 66-75
|
283.
Investigation of Time-of-Flight Benefits on the LYSO-Based PET/CT Scanner: A Monte Carlo Study Using GATE
P. Geramifar, M.R. Ay, M. Shamsaie Zafarghandi, S. Sarkar, G. Loudos, A. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Nuclear. Instrumentation Methods in Physics Research A , 2011 Vol. 641, pp. 121-127
|
284.
Is Metal Artifact Reduction Mandatory in Cardiac PET/CT Imaging in the Presence of Pacemaker and Implantable Cardioverter Defibrillator leads?
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
European Journal of Nuclear Medicine and Molecular Imaging, 2011, Vol. 38, No. 2, pp 252-262
|
285.
Is percentage error of bone density determined by DEXA technique influenced by density?
A. Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, P. Ghafarian and S. Taghizadeh
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 88
|
286.
Monte Carlo estimation of electron contamination in a 18MV clinical photon beam
M. Allahverdi, M. Zabih Zadeh, M.R. Ay, S.R. Mahdavi, M. Shahriari ,A. Mesbahi and H. Alijanzadeh
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Radiation Research, 2011, Vol. 9 pp 15-28
|
287.
Monte Carlo-based evaluation of inter-crystal scatter and penetration in the PET subsystem of three GE Discovery PET/CT scanners
N. Zeraatkar, M. R. Ay, P. Ghafarian, S. Sarkar, P. Geramifar, and A. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Nuclear. Instrumentation Methods in Physics Research A, 2011, Vol. 659, pp. 508-514
|
288.
Novel detector design for reducing inter-cell x-ray cross-talk in the variable resolution x-ray CT scanner: A Monte Carlo study
H. Arabi, A Kamaliasl, M.R. Ay and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 2011, Vol. 30 pp. 1389-1396
|
289.
Photon scatter and penetration in parallel hole collimator in preclinical Gamma Camera: A Monte Carlo study
F. Adibpour, M.R. Ay, S. Sarkar and G. Lodous
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 147
|
290.
Qualitative and quantitative assessment of metal artefacts arising from implantable cardiac pacing devices in oncological PET/CT studies: A phantom study
M.R. Ay, A. Mehranian, M. Abdoli, P. Ghafarian and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Molecular Imaging & Biology, 2011, Vol. 13, pp. 1077-1088
|
291.
Quantification of bremsstrahlung images with respect to post radioemoblization liver dosimetry
M.R. Teimoori, Sh. Akhlagpour, M.R. Ay, F. Kalantari and M. Amoui
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 103
|
292.
The influence of misalignment between PET and CT images on the accuracy of CT-based attenuation correction in thorax imaging: a simuation study
A. Anvari, M.R. Ay and B. Fallahi
|
|
|
3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 190
|
293.
Use of optimization transfer for enhanced direct 4D parametric imaging in myocardial perfusion PET
A. Rahmim, J. Tang, H. Muhy-ud-Din, M.R. Ay, and M. A. Lodge
|
|
|
Society of Nuclear Medicine (SNM) Annual Meeting, 2011, San Antonio, Texas, USA, J. Nucl. Med., vol. 52 (Supplement 1): 265, 2011
|
294.
4D Respiratory motion-corrected Rb-82 myocardial perfusion PET imaging
A. Rahmim, J. Tang, M.R. Ay and F. M. Bengel
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Knoxville, Tennessee, 2010, pp. 3312-3316
|
295.
A new method for experimental characterization of scattered radiation in 64-slice CT scanner
A. Akbarzadeh, M.R. Ay ,H. Ghadiri, S.Sarkar
|
|
Peer-reviewed Journal Publication
|
|
Biomedical Imaging and Intervention Journal, 2010, 6(1):e3
|
296.
A Novel Approach for Implementation of Dual Energy Mapping Technique in CT-Based Attenuation Correction Using Single kVP Imaging: A Feasibility Study
B. Teimourian, M.R. Ay, H. Ghadiri, M. Shamsaei Zafarghandi and H. Zaidi
|
|
Proceeding and Conference Record
|
|
12th Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2010), Chalkidiki, Greece, MEDICON 2010, IFMBE Proceedings 29, pp. 220–223, 2010
|
297.
A Novel Model for Monte Carlo Simulation of Performance Parameters of the Rodent Research PET (RRPET) Camera Based on NEMA NU-4 Standards
N. Zeraatkar, M.R. Ay, A. Kamali-Asl and H. Zaidi
|
|
Proceeding and Conference Record
|
|
12th Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2010), Chalkidiki, Greece, MEDICON 2010, IFMBE Proceedings 29, pp. 311–314, 2010
|
298.
A Virtual Sinogram Method to Reduce Dental Metallic Implant Artefacts in CT-based Attenuation Correction for PET
M. Abdoli, M.R. Ay, A. Ahmadian and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Medicine Communication, 2010, 31, 22-31
|
299.
Accurate 3D Dosimetry for Internal Radiotherapy by Considering the Effect of Nonuniform Activity Distribution
E. Saeedzadeh, A. Abbaspour, S. Sarkar, M.R. Ay, H.R. Khosravi
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 112
|
300.
Accurate 3D-Dosimetry for Internal Radiotherapy with 131I Using GATE Monte Carlo Code
E. Saeed Zadeh, S. Sarkar, A. Abbaspour, M.R. Ay, H. Khosravi, G. Lodus
|
|
|
9th Iranian Congress of Medical Physics, Tehran, Iran, 2010, pp 116
|
301.
Accurate Modeling for Monte Carlo Based Performance Evaluation of The PET Subsystem of the FLEX Triumph Priclinical PET/CT Scanner Using NEMA NU-4 Standard
N. Zeraatkar, M.R. Ay, A.R. Kamali-Asl, H. Zaidi
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-163
|
Nominated as one of the best submitted abstracts
302.
Advances in Multimodality Molecular Imaging Instrumentation
M.R. Ay
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 77
|
303.
Assessment of the Influence of Crystal Material and Size on the Sensitivity of Dual Head Small Animal PET Scanner
N. Ghazanfari, M.R. Ay, S. Sarkar and G. Loudos
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 120
|
304.
Assessment of the Influence of PET and CT Data Misalignment Errors in Cardiac PET/CT Examination: Patient and Phantom Studies
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Fard Esfahani and H. Zaidi
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 81
|
305.
Calculation Of Scattered Radiation Profile In 64 Slice CT Scanners Using Experimental Measurement
A. Akbarzadeh, M.R.Ay ,H.Ghadiri, S.Sarkar
|
|
Peer-reviewed Journal Publication
|
|
Iran J. Medical Physics , 2010, 6, 1-10
|
306.
Coronary calcium score scan-based attenuation correction in cardiovascular PET imaging
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, B. Fallahi, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Medicine Communication, 2010, Vol. 31, No 9, pp 780-787
|
307.
Coronary Calcium Score Scan-Based Attenuation Correction in Viability PET Examination: A Feasibility Study
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, B. Fallahi, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-16
|
308.
CT2MCNP: An Integrated Package for Constructing Patient-Specific Voxel-Based Phantoms Dedicated for MCNP(X) Monte Carlo Code
A. Mehranian, M.R. Ay and H. Zaidi
|
|
Proceeding and Conference Record
|
|
12th Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2010), Chalkidiki, Greece, MEDICON 2010, IFMBE Proceedings 29, pp. 319–322, 2010
|
309.
Effects of Crystal Pixel Size and Collimator Geometry on the Performance of a Pixelated Crystal Gamma Camera Using Monte Carlo Simulation
M. Rasouli, A. Takavar, M.R. Ay, S. Saber, and G. Loudos
|
|
Peer-reviewed Journal Publication
|
|
Journal of Nuclear Medicine Technology, 2010, Vol. 38, No 4, pp 199-204
|
310.
Evaluation of Dose Distribution in Co-60 Machine Using Radicromic Film and Monte Carlo
M. Mollazadeh, , M. Allahverdi, T. Pourfallah, N. Riahi Alam, M.R. Ay
|
|
|
16th Conference of Biomedical Engineering, Tehran, Iran, 2010, PP. 157
|
311.
Evaluation of MRI-based Polymer Gel Dosimetry for Measurement of CT Dose Index (CTDI) on 64 slices CT Scanners
L. Karimi-Afshar, N. Riahi Alam, M.R.Ay, M. Allahverdi, T. Purfallah, H. Hashemi, A. Farahani, B. Efie, M. Bakhteiari
|
|
Peer-reviewed Journal Publication
|
|
Iran J. Medical Physics , 2010, 6, 59-70
|
312.
Experimental Measurement of Modulation Transfer Function (MTF) in Five Commercial CT Scanners
S.M. Akbari, M.R. Ay, A. Kamali Asl, H. Ghadiri and H. Zaidi
|
|
Proceeding and Conference Record
|
|
12th Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2010), Chalkidiki, Greece, MEDICON 2010, IFMBE Proceedings 29, pp. 351–354, 2010
|
313.
Impact of Metal Artifact Reduction on Cardiac FDG-PET/CT Studies in the Presence pf pacemaker and Implantable Cardio Verter Defibrator Leads
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Fard Esfahani, A. Rahmim, T.H. Schindler, O. Ratib and H. Zaidi
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 104
|
314.
Implementation and Comparison of to Empirical Methods for Calculation of MTF in CT
M. Akbari, M.R. Ay, A. Kamali Asl, H. Ghadiri
|
|
|
16th Conference of Biomedical Engineering, Tehran, Iran, 2010, PP. 155
|
315.
Measurement of scattered radiation in a volumetric 64-slice CT scanner using three experimental techniques
A. Akbarzadeh, M. R. Ay, H. Ghadiri, S. Sarkar and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Physics Medicine and Biology, 2010, 55, 2269-2280
|
316.
Optimization of weighted virtual sinogram-based metal artifact reduction in CT-based attenuation correction of PET data using a genetic algorithm
M. Abdoli, M.R. Ay, A. Ahmadian, R.A. Dierckx and H. Zaidi
|
|
|
European Association of Nuclear Medicine Annual Congress, 9-13 October 2010, Vienna, Austria. Eur J Nucl Med Mol Imaging, Vol 37, Suppl. 1, (2010)
|
317.
Performance Assessment and Optimization of Pixelated Gamma Camera with Small Field of View: A Monte Carlo Study
F. Adibpour, M.R. Ay, S. Sarkar and G. Loudos
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 116
|
318.
Quantification and Correction of Metallic Artifact Arising from Implantable cardiac Pacing Devices in PET/CT Studies: A Phantom Study
M.R. Ay, A. Mehranian, P. Ghafarian, M. Abdoli and H. Zaidi
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-20
|
Nominated as one of the best submitted abstracts
319.
Quantification of Inter Crystal Scatter and Parallax Events in LYSO-Based Discovery RX PET/CT Scanner: A Monte Carlo Study
N. Zeraatkar, M.R. Ay, S. Sarkar, A. Rahmim, P. Geramifar
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-158
|
Nominated as one of the best submitted abstracts
320.
Quantification of Inter-Crystal Scatter and Penetration Events in GE Discovery RX PET/CT Scanner: a Monte Carlo Simulation
N. Zeraatkar, M.R. Ay, S. Sarkar, P. Geramifar and A. Rahmim
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Knoxville, Tennessee, 2010, pp. 2403-2408
|
321.
Quantification of Respiratory Induced Artifact in CT-Based Attenuation Correction of PET Data: A Simulation Study
Z. Anvari, M.R. Ay, B. Fallahi, F. Buther
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 79
|
322.
Quantifying the effect of anode surface roughness on diagnostic x-ray spectra using Monte Carlo simulation
A. Mehranian, M.R. Ay, N. Riahi and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 2010, 37, 742-752
|
323.
Quantitative Assessment if Inter-Crystal Scatter and Penetration in the PET Subsystem of the FLEX Triumph Preclinical Multi-Modality Scanner
H. Arabi, N. Zeratkar, M.R. Ay, H. Zaidi
|
|
|
The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 40
|
324.
Reduction of dental filling metallic artefacts in CT-based attenuation correction of PET data using weighted virtual sinograms optimized by a genetic algorithm
M. Abdoli, M.R. Ay, A. Ahmadian, A. J. O. Dierckx and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 2010, Vol. 37, No 12, pp 6166-6177
|
325.
The Effect of Nonuniform Activity Distribution in Three-Dimensional Dosimetry for Internal Radiotherapy with 131I
E. Saeed Zadeh, S. Sarkar, A. Abbaspour, M.R. Ay, H. Khosravi, G. Lodus
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-30
|
326.
The Influence of Patient Miscentering of Patient Dose and Image Noise in Two Commercial CT Scanners
M. Habibzadeh, M.R. Ay, A. Kamali Asl, H. Ghadiri
|
|
|
16th Conference of Biomedical Engineering, Tehran, Iran, 2010, PP. 158
|
327.
The Influence of Patient Miscentering on Patient Dose and Image Noise in Two Commercial CT Scanners
M.A. Habibzadeh, M.R. Ay, A. Kamali Asl, H. Ghadiri and H. Zaidi
|
|
Proceeding and Conference Record
|
|
12th Mediterranean Conference on Medical and Biological Engineering and Computing (MEDICON 2010), Chalkidiki, Greece, MEDICON 2010, IFMBE Proceedings 29, pp. 327–330, 2010
|
328.
Virtual Dual Energy CT (VDECT): A Novel Approach for Improved Energy Mapping in CT-Based Attenuation Correction of PET Data
B. Teimourian, M.R. Ay, M. Shamsaei Zafarghandi, H. Ghadiri and H. Zaidi
|
|
|
10th Congress of the World Federation of Nuclear Medicine and Biology (WFNMB 2010), Cape Town, South Africa, South Africa, World Journal of Nuclear Medicine, Vol. 9, Supp. 1, 2010, pp. S-33
|
329.
A Novel Application of MRI-Polymer Gel Dosimeter for Measurement of CTDI on X-Ray 64 Slices CT Scanner
L. Karimiafshar, N. Riyahi Alam, M.R. Ay, M. Alahverdi, T. Alahvirdi Pourfallah , H. Hashemi, A. Farahani,B. Rafiei and M. Bakhtiar
|
|
Proceeding and Conference Record
|
|
The World Congress on Medical Physics and Biomedical Engineering, Germany, Munich, 7-12 September 2009, IFMBE Proceedings 25, pp. 541-544
|
330.
CT-based attenuation correction on the FLEX Triumph™ preclinical PET/CT scanner
R. Prasad, M.R Ay, O. Ratib and H. Zaidi
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Orlando (FL) USA, 25-31 October 2009, 3357-3362
|
331.
Quantitative assessment of the effect of anode surface roughness on diagnostic x-ray spectra using Monte Carlo simulation
A. Mehranian , M.R. Ay, N. Riahi Alam and H. Zaidi
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Orlando (FL) USA, 25-31 October 2009, 2902-2907
|
332.
Reduction of dental filling metallic artifacts in CT-based attenuation correction of PET data using weighted virtual sinograms
M. Abdoli , M.R. Ay, A. Ahmadian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Orlando (FL) USA, 25-31 October 2009, 2752-2755
|
333.
Comparative assessment of image- and virtual sinogram-based metal artefact reduction techniques for CT-based attenuation correction in PET
M. Abdoli, M.R. Ay, A. Ahmadian and H. Zaidi
|
|
|
European Association of Nuclear Medicine Annual Congress, 10-14 October 2009, Barcelona, Spain. Eur J Nucl Med Mol Imaging, Vol 36, Suppl. 1, pp S226
|
334.
The Effect of Crystal Size on Position Detection Accuracy in PET Block Detectors: A Monte Carlo Study
S. Lashkari, S. Sarkar, M.R. Ay and A. Rahmim
|
|
|
European Association of Nuclear Medicine Annual Congress, 10-14 October 2009, Barcelona, Spain. Eur J Nucl Med Mol Imaging, Vol 36, Suppl. 1, pp S409
|
335.
Challenges for Planning and Running a PET/CT and Cyclotron Facility
M.R. Ay
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 10
|
336.
CT Based Attenuation Correction in Cardiac PET/CT Using Calcium Score CT Image: A Feasibility Study
P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Rahmim and H. Zaidi
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 9
|
337.
Implementation and comparison of different energy mapping approaches in CT-based attenuation correction of PET
M.R.Ay, M. Shirmohammad, S. Sarkar, A. Rahmim, H. Zaidi
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 51
|
338.
Implementation of Dual Energy Mapping Techniques in CT-Based Attenuation Correction Method Using Single Energy Imaging: A Novel Approach for Reducing Patient Dose
B. Teimourian, M.R. Ay, M. Shamsaei Zafarghandi
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 52
|
339.
Strategies for Attenuation Correction in PET/CT and PET/MRI
M.R. Ay
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 8
|
340.
Validation of the GATE Monte Carlo Code in Evaluation of Organ Doses Calculation in Zubal Voxelized Phantom
E. Saeedzadeh, S. Sarkar, A. Abbaspour Tehrani-Fard, M.R. Ay, H.R. Khosravi
|
|
|
International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 50
|
341.
Monte Carlo Estimation of Photoneotrons Contamination from High Energy Medical Accelerator in Treatment Room and Maze
M. Zabih Zadeh, M.R. Ay, M. Allahverdi, A. Mesbahi, S.R. Mahdavi and M. Shahriari
|
|
|
10th Biennial ESTRO Conference on Physics and Radiation Technology for Clinical Radiotherapy, Maastricht, August 30 – September 3, 2009
|
342.
Metal Artifact Reduction in CT-Based Attenuation Correction of PET Data Using the Virtual Sinogram Concept
M. Abdoli, M.R. Ay, A. Ahmadian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
3rd International Conference on Bioinformatics and Biomedical Engineering (IEEE iCBBE 2009), June 11th to 13th, 2009, 1-4, Beijing, China
|
343.
Quantification of PET and CT Data Misalignment Errors in Cardiac PET/CT: Clinical and Phantom Studies
P. Ghafarian and S.M.R. Aghamiri, M.R. Ay, A. Rahmim and H. Zaidi
|
|
Proceeding and Conference Record
|
|
3rd International Conference on Bioinformatics and Biomedical Engineering (IEEE iCBBE 2009), June 11th to 13th, 2009, 1-4, Beijing, China
|
344.
The Influence of X-ray Spectra Filtration on Image Quality and Patient Dose in the GE VCT 64-Slice Cardiac CT Scanner
M.R. Ay, A. Maleki, H. Ghadiri, P. Ghafarian, A. Ahmadian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
The 3rd International Conference on Bioinformatics and Biomedical Engineering (IEEE iCBBE 2009), June 11th to 13th, 2009, 1-4, Beijing, China
|
345.
Evaluation of polymer gel dosimetry based on MRI imaging for measurement of CTDI in 64 slice CT scanner
L. Karimiafshar, N. Riahi Alanm and M.R. Ay
|
|
|
1st Congress of Radiation Protection in Radiotherapy, Diagnostic and Interventional Radiology, 19-20 February 2009, Tehran, Iran
|
346.
PET/CT: Site Planning and Shielding Calculation
M.R. Ay
|
|
|
1st Congress of Radiation Protection in Radiotherapy, Diagnostic and Interventional Radiology, 19-20 February 2009, Tehran, Iran, 43-44
|
347.
A Novel Dual Energy CT-Based Attenuation Correction Method in PET/CT Systems: A Phantom Study
B. Teymoorian, M.R. Ay, M. Shamsaei Zafarghandi and H. Ghadiri
|
|
Peer-reviewed Journal Publication
|
|
" Iranian Journal of Nuclear Medicine, 2009, 17, 42-49
|
348.
Differential Dose Volume Histograms of Gamma Knife in Presence of Inhomogeneities Using MRI- polymer Gel Dosimetry and MC Simulation
T. Allahverdi, M. Allahverdi, N. Riahi Alam, M.R. Ay, M. Zahmatkesh
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 2009, 36,3002-3012
|
349.
Evaluation of Dose Delivery Accuracy of Gamma Knife Using MRI Polymer Gel Dosimeter in an Inhomogeneous Phantom
T. Allahverdi, M. Allahverdi, N. Riahi Alam, M.R. Ay, M. Zahmatkesh
|
|
Peer-reviewed Journal Publication
|
|
Journal of Physics: Conference Series 164, 2009, doi:10.1088/1742-6596/164/1/012066
|
350.
Monte Carlo Estimation of Photoneotrons Contamination from High Energy Medical Accelerator in Threatment Room and Maze: A Simplified Model
M. Zabih Zadeh, M.R. Ay, M. Allahverdi, A. Mesbahi, S.R. Mahdavi and M. Shahriari
|
|
Peer-reviewed Journal Publication
|
|
Radiation Detection Dosimetry, 2009, 135, 21-32
|
351.
Performance Comparison of Four Commercial GE Discovery PET/CT Scanners: A Monte Carlo Study Using GATE
P. Geramifar, M.R. Ay, M. Shamsaie Zafarghandi,G. Loudos, A. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Iranian Journal of Nuclear Medicine, 2009, 17, 26-33
|
352.
Performance evaluation of MRI-based PAGAT polymer gel dosimeter in an inhomogeneous phantom using EGSnrc code on a co-60 machine
T. Allahverdi, M. Allahverdi, N. Riahi Alam, M.R. Ay, M. Zahmatkesh and J.S. Ibbott
|
|
Peer-reviewed Journal Publication
|
|
Applied Radiation and Isotopes, 2009, 67, 186-191
|
353.
Verifying the accuracy of dose distribution in Gamma Knife unit in presence of inhomogeneities using PAGAT polymer gel dosimeter and MC simulation
T. Allahverdi, M. Allahverdi, N. Riahi Alam, M.R. Ay, M. Zahmatkesh
|
|
Peer-reviewed Journal Publication
|
|
Iranian J. of Radiation Research, 2009, 7, 49-56
|
354.
A novel approach for reducing dental filling artefacts in CT-based attenuation correction of head and neck oncologic PET/CT data
M. Abdoli, M.R Ay, A. Ahmadian, N. Sahba and H. Zaidi
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 492–495
|
355.
Comparative assessment of different energy mapping approaches in CT based attenuation correction: a patient study
M. Shirmohammad, M.R. Ay, A. Rahmim, S. Sarkar and H. Zaidi
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 496–499
|
356.
Comparative Assessment of Rotating Slat and Parallel Hole Collimator Performance in GE DST-Xli Gamma Camera: A Monte Carlo Study
N. Dehestani, S. Sarkar, M.R. Ay, M. Sadeghi and M. Shafaei
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 1062–1065
|
357.
Monte Carlo assessment of geometric, scatter and septal penetration components in high energy collimators
M. Shafaei, M.R. Ay, S. Sardari and H. Zaidi
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 2479–2482
|
358.
Reduction of Intravenous Contrast Related Artifacts in CT-based Attenuation Corrected PET Images
M.R. Ay, J.H. Bidgoli, P. Ghafarian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 513–516
|
359.
The Influence of InterCrystal Scattering on Detection Efficiency of Dedicated Breast Gamma Camera: A Monte Carlo Study
M. Rasouli, M.R. Ay, A. Takavar, S. Lashkari and G. Loudos
|
|
Proceeding and Conference Record
|
|
4th European Congress of the International Federation of Medical and Biological Engineering, Antwerp, Belgium, 23-27 November 2008 ECIFMBE 2008, IFMBE Proceedings 22, pp. 2451–2454
|
360.
Characterization of Scatter and Penetration Using Monte Carlo Simulation in Ga-67 Imaging
M. Shafaee, M.R. Ay and D. Sardari
|
|
|
9th ASIA Oceania Congress of Nuclear Medicine and Biology, Oct 31st - Nov 4th, 2008, New Delhi, India, Indian Journal of Nuclear Medicine, Vol 23, p.171
|
361.
A hybrid approach for accurate estimation of the scatter component in x-ray CT combining experimental measurements and Monte Carlo simulations
A. Akbarzadeh, M.R. Ay, H. Ghadiri, S. Sarkar and H. Zaidi
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Dresden, Germany, 19-25 October 2008, 3864-3867
|
362.
Monte Carlo Based Performance Assessment of Four Commercial GE Discovery PET/CT Scanners Using GATE
P. Geramifar, M.R. Ay, M. Shamsai Zafarghandi, G. Loudos, A. Rahmim
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Dresden, Germany, 19-25 October 2008, 3995-3999
|
363.
Rb-82 Cardiac PET Imaging with Resolution Modeling
A. Rahmim, J. Tang, M. A. Lodge, S. Lashkari, M.R. Ay, R. Lautamaki, B. M. W. Tsui, and F. Bengel
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference, Dresden, Germany, 19-25 October 2008, 3643-3650
|
364.
A novel energy mapping method for attenuation map generation at 511 keV in computed tomography based attenuation correction
M. Shirmohammad, M.R. Ay, A. Rahmim A, S. Sarkar and H. Zaidi
|
|
|
European Association of Nuclear Medicine Annual Congress, 11-15 October 2008, Munich, Germany. Eur J Nucl Med Mol Imaging, Vol 35, Suppl. 2, S146
|
Nominated as one of the best submitted abstracts
365.
Monte Carlo Simulation of The GE LYSO-Based Discovery RX PET/CT Scanner Using GATE: a Validation Study
P. Geramifar, M.R. Ay, M. Shamsaii Zafarghandi,G. Lodous, A. Rahmim
|
|
|
European Association of Nuclear Medicine Annual Congress, 11-15 October 2008, Munich, Germany. Eur J Nucl Med Mol Imaging, Vol 35, Suppl. 2, S175-176
|
366.
The Influence of Crystal Depth on Position Detection Accuracy and Detection Efficiency in PET Block Detector: A Monte Carlo Study
S. Lashkari, S. Sarkar, M.R. Ay and A. Rahmim
|
|
|
European Association of Nuclear Medicine Annual Congress, 11-15 October 2008, Munich, Germany. Eur J Nucl Med Mol Imaging, Vol 35, Suppl. 2, S337-338
|
367.
A novel approach for experimental measurement of scatter profile and scatter to primary ratio in a 64-slice CT scanner
A. Akbarzadeh A, M.R. Ay, H. Ghadiri, S. Sarkar and H. Zaidi
|
|
Proceeding and Conference Record
|
|
4th Kuala Lumpur International Conference on Biomedical Engineering, 25-28 June 2008, Kuala Lumpur, Malaysia, IFMBE Proceedings Series, Vol. 21, pp 473-477
|
368.
The Influence of Crystal
Material on Intercrystal Scattering and the Parallax Effect in PET Block
Detectors: A Monte Carlo Study
S. Lashkari, S. Sarkar, M.R. Ay and A. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
4th Kuala Lumpur International Conference on Biomedical Engineering, 25-28 June 2008, Kuala Lumpur, Malaysia, IFMBE Proceedings Series, Vol. 21, pp 633-636
|
369.
Comparative Assessment of Different Energy Mapping Methods for Generation of 511- keV Attenuation Map from CT Images in PET/CT Systems: A Phantom Study
M. Shirmohammad, M.R. Ay, H. Ghadiri, S. Sarkar and A. Rahmim
|
|
Proceeding and Conference Record
|
|
5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 14-17 May, Paris, France, 2008, 644-647
|
370.
Monte Carlo Assessment of Time-of-Flight Benefits on The LYSO-Based Discovery RX PET/CT Scanner
P. Geramifar, M.R. Ay, M. Shamsayee, G. Lodous and A. Rahmim
|
|
Proceeding and Conference Record
|
|
5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 14-17 May, Paris, France, 2008, 364-367
|
371.
Analytic System Matrix Resolution in PET: An Application to RB-82 Cardiac Imaging
A. Rahmim, M. Lodge, J. Tang, S. Lashkari and M.R. Ay
|
|
Proceeding and Conference Record
|
|
5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 14-17 May, Paris, France, 2008, 1307-1310
|
372.
Analytic System Matrix Resolution Modeling in PET: An Application to Rb-82 Myocardial Perfusion Imaging
A. Rahmim, J. Tang, M. A. Lodge, S. Lashkari, M.R. Ay, R. Lautamaki, B. M. W. Tsui, and F. Bengel
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine and Biology, 2008, 53, 5947-5965
|
373.
Comparing 511 keV attenuation maps obtained from different energy mapping methods for CT based attenuation correction of PET data
M. Shirmohammad, M.R. Ay, S. Sarkar and A. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Iran J. Medical Physics , 2008,5, 23-34
|
374.
Correction of oral contrast artefacts in CT-based attenuation correction of PET images using an automated segmentation algorithm
A. Ahmadian, M.R. Ay, J.H. Bidgoli, S. Sarkar and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
European Journal of Nuclear Medicine and Molecular Imaging, 2008, 35, 1812-1823
|
375.
EGSnrc calculated and MRI-Polymer Gel Dosimeter Measured Dose Distribution of Gamma Knife in Presence of Inhomogeneities
P. Allahverdi, N. Riahi Alam, M. Allahverdi, M.R. Ay, M. Zahmatkesh M
|
|
Proceeding and Conference Record
|
|
International Congress of Medical physics, India, 2008
|
376.
Evaluation of Dose Delivery Accuracy of Gamma Knife Using MRI Polymer Gel Dosimeter in an Inhomogeneous Phantom
P. Allahverdi, N. Riahi Alam, M. Allahverdi, M.R. Ay, M. Zahmatkesh M
|
|
Proceeding and Conference Record
|
|
5th Congress on Radiotherpy Gel Dosimetry, 2008 , Greece, 399-403
|
377.
Improved clinical and quantitative dynamic Rb-82 cardiac imaging with resolution modelling
A. Rahmim, J. Tang, M. A. Lodge, S. Lashkari, M.R. Ay, R. Lautamaki, B. M. Tsui, and F. Bengel
|
|
|
J. Nucl. Med., vol. 49 (Supplement 1): 62P, 2008
|
Abstract
Objectives:
To investigate, in the context of Rb-82 cardiac PET imaging, improvements in image quality obtained via a novel resolution modeling approach.
Methods:
An accurate resolution modeling approach was developed in which resolution degrading factors were modeled within reconstruction. A combined simSET/GATE Monte-Carlo tool was used to simulate Rb-82 cardiac acquisition. Time activity curves of myocardium, blood pool and other organs were measured from five healthy patients, and spline-smoothed to simulate the input activities. Multiple noise realizations within clinical (90sec delay, 5min) and quantitative dynamic (30sec delay, 10x12sec) imaging were simulated. For the former, defects were also simulated, and defect contrast vs. noise plots were assessed. For the latter, we performed compartmental analyses on the reconstructed image sequences, and the bias vs. variance for the K1 values were compared.
Results:
The reconstructed resolution was seen to improve from 5.1mm-7.7mm across the FoV to ~3.5mm nearly uniformly across the FoV. Hot and cold sphere contrast vs. noise trade-off curves were seen to substantially improve. Defect contrast vs. noise was significantly improved (75% to 63%, matched noise, true contrast 50%). For the dynamic sequence considered, with increasing post-smoothing, the results indicated increasing bias and decreasing variance in the compartmental extracted K1 values, and the trade-off curve was substantially improved with resolution modeling.
Conclusions:
Accurate resolution modeled reconstruction can significantly improve image quality in clinical and quantitative dynamic Rb-82 cardiac PET imaging.
378.
The Influence of Crystal Material on Intercrystal Scattering and the Parallax Effect in PET Block Detectors: A Monte Carlo Study
S. Lashkari, S. Sarkar, M.R. Ay, R. Rahmim
|
|
Peer-reviewed Journal Publication
|
|
Iran J. Medical Physics , 2008, 21, 67-76
|
379.
A hybrid approach for fast simulation of x-ray computed tomography
M.R. Ay, P. Ghafarian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007, Vol. 4, pp 3155-3160
|
380.
Correction of correction of PET images using an automated segmentation algorithm
J.H. Bidgoli, M.R. Ay, S. Sarkar, A. Ahmadian and H. Zaidi
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007, Vol. 5, pp 3542-3547
|
381.
Impact of x-ray tube voltage, field size and phantom thickness on scattered radiation in diagnostic radiology: A Monte Carlo investigation
P. Ghafarian, M.R. Ay, H. Ghadiri, S. Sarkar and H. Zaidi
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007, Vol. 5, pp 3830-3834
|
382.
Influence of energy indexing algorithm and electron substeps on MCNP4C electron transport: Application to simulation of x-ray spectra in diagnostic radiology and mammography
M.R. Ay, H. Ghadiri, P. Ghafarian, S. Sarkar and H. Zaidi
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007, Vol. 5, pp 4006-4011
|
383.
Automatic Segmentation of Oral Contrast Enhanced CT Images for Artifact Free Attenuation Correction in PET/CT
M.R. Ay, J.H. Bidgoli, S. Sarkar and A. Ahmadian
|
|
|
European Association of Nuclear Medicine Annual Congress, 13-19 October 2007, Copenhagen, Denmark. Eur J Nucl Med Mol Imaging, Vol 34, Suppl 2, S115
|
384.
Computed Tomography Based Attenuation Correction in PET/CT: Principles, Instrumentation, Protocols, Artifacts and Future Trends
M.R. Ay and S. Sarkar
|
|
Peer-reviewed Journal Publication
|
|
Iranian J. Nucl. Med., 2007, 15, 1-29
|
385.
Current status and new horizons in Monte Carlo simulation of x-ray CT scanners
H. Zaidi and M.R. Ay
|
|
Peer-reviewed Journal Publication
|
|
Medical & Biological Engineering & Computing , 2007, 45, 809-817
|
386.
Evaluation of Scatter and penetration in HEGP Collimator in DST Xli Gamma Camera During I131 Imaging
M. Shafaee, M.R. Ay, D. Sardari
|
|
|
14th Iranian Nuclear Science Conference, Yazd, Iran, 2007, P.111
|
387.
Impact of x-ray tube settings and metallic leads on neurological PET imaging when using CT-based attenuation correction
M.R. Ay and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Nuclear. Instrumentation Methods in Physics Research A , 2007, 571, 411-417
|
388.
Validation and Performance Evaluation of Discovery Rx whole Body PET/CT Scanner Using GATE
P. Geramifar, M.R. Ay, M. Shamsaei
|
|
|
14th Iranian Nuclear Science Conference, Yazd, Iran, 2007, P.33
|
389.
A Novel Hybrid Approach for Measurement of Bone Mineral Density and Content with High Signal to Noise Ratio
H. Ghadiri and M.R. Ay
|
|
Proceeding and Conference Record
|
|
Proceedings of World Congress on Medical physics and Biomedical Engineerin, Seoul, Korea, August 27 – September 1, 2006, pp. 1324-1327
|
390.
Impact of x-ray scatter when using CT-based attenuation correction in PET: A Monte Carlo investigation
H. Zaidi and M.R. Ay
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, San Diego, USA, 29 October - 4 November 2006, Vol. 4; pp. 2161-2165
|
391.
Simulation-based assessment of the impact of contrast medium on CT-based attenuation correction in PET
M.R. Ay and H. Zaidi
|
|
Proceeding and Conference Record
|
|
Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference. San Diego, USA, 29 October - 4 November 2006, Vol. 5; pp. 2731-2735
|
Recipient of 2006 IEEE Medical Imaging Conference Award
392.
Characterization of sources of artefact when using CT-based attenuation correction in PET
M.R. Ay and H Zaidi
|
|
|
7th annual congress of the Swiss Society of Nuclear Medicine (SSNM), Lausanne, Switzerland, 1-3 June 2006, Nuklearmedizin Vol 45, p. A139
|
393.
Assessment of the impact of x-ray tube voltage on quantitative analysis of neurological PET when using CT-based attenuation correction
M.R. Ay and H Zaidi
|
|
|
1st European conference in Molecular Imaging Technology, Marseille, France, 9-12 May 2006, p. 22
|
394.
Analytical and Monte Carlo modeling of x-ray spectra in mammography, in Emerging Technologies in Breast Imaging and Mammography
M.R. Ay and H. Zaidi
|
|
|
J.S. Suri, R.M. Rangayyan, and S. Laxminarayan, Editors. 2006, American Scientific Publishers: Valencia, CA. ISBN: 1-58883-090-X, 2006, pp 25-44
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DESCRIPTION
Breast cancer is the second leading cause of cancer deaths in women today (after lung cancer) and is the most common cancer among women, excluding non-melanoma skin cancers. According to the World Health Organization (WHO), more than 1.2 million people will be diagnosed with breast cancer this year worldwide. The American Cancer Society estimated that in 2005 approximately 211,240 women in the United States were diagnosed with invasive breast cancer (Stages I-IV). The chance of developing invasive breast cancer during a woman's lifetime is approximately 1 in 7 (13.4%). Another 58,490 women will be diagnosed with in situ breast cancer, a very early form of the disease. Though much less common, breast cancer also occurs in men. An estimated 1,690 cases were diagnosed in men in 2005. This year alone, the National Institutes of Health, the Centers of Disease Control (CDC), and the Department of Defense will collectively spend more than $850 million on breast cancer research. Today the literature of breast imaging technologies is clouded with uncertainty. There is no perfect method to tell which technique performs better or the best. It is also not clear how well the new progressing technologies are going to play a role in early breast cancer detection due partly because the emerging technologies have not established a clear strategy to achieve superior instrumentation for screening and diagnosis and for improving the sensitivity and specificity of the imaging or computer-aided diagnosis systems.
This book is the first of its kind to address the issues on cutting edge emerging technologies for breast imaging and mammography. The book covers all facets of nature to image the breast, may it be light (optical), sound (ultrasound), magnetism, attenuation, microwave, electrical impedance, fusion of these modalities, and some of the very hot topics on Computer Aided Detection. The novelty of this book is due to the contributions of pioneers around the world. This book offers a very comprehensive and up-to-date perspective on the state of breast cancer screening instrumentation, diagnosis, and therapy and recommends steps for developing the most reliable breast cancer detection and therapeutic methods possible. This volume, for the first time, covers numerous topics on how to attack breast cancer from almost all different angles of medical imaging modalities such as X-ray, CT, MR, PET, SPECT, nuclear, ultrasound, microwave, optical, electrical impedance, thermal, infrared, and its fusion. Another novelty of this book is modeling breast cancer detection, diagnosis, and therapy in 3-D. The book begins with highlights on different kinds of breast cancer and its pathology and then introduces the engineers, scientists, innovators, and strategists to put their algorithms and designs for solving the number one killer problem in women’s health imaging.
The book is divided into six parts: Part-I is dedicated to X-ray mammography and its applications, including modeling X-ray spectra, phase-contrast, and stereoscopic mammography. Part-II is dedicated to 3-D breast imaging and tomosynthesis, one of the most cutting-edge topics from pioneers. Part-III is dedicated to breast imaging using ultrasound and its applications. This involves detection, elastography, vibro-acoustography, breast biopsy, and breast cancer therapy using HIFU. Part-IV concentrates on some emerging techniques such as optical, microwave, electrical impedance tomography, nuclear, and infrared and thermal imaging techniques. Part-V is dedicated to some of the advanced computer-aided detection techniques applied to architectural distortion. Finally, the book concludes, in Part-VI, on the fusion of various modalities and some future predictions in the breast imaging area.
395.
Assessment of errors caused by x-ray scatter and use of contrast medium when using CT-based attenuation correction in PET
M.R. Ay and H. Zaidi
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|
Peer-reviewed Journal Publication
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|
European Journal of Nuclear Medicine and Molecular Imaging, 2006, 33 (11), 1301-1313
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396.
Computed tomography-based attenuation correction in neurological positron emission tomography: evaluation of the effect of x-ray tube voltage on quantitative analysis
M.R. Ay and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Nuclear Medicine Communication, 2006, 27, 339-346
|
397.
MCNP4C-based Monte Carlo simulator for fan- and cone-beam x-ray CT: development and experimental validation
M.R. Ay, S. Sarkar, M. Shahriari, D. Sardari, and H. Zaidi
|
|
Proceeding and Conference Record
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|
14th International Conference of Medical Physics. Biomedizinische Technik. 2005. Nuremberg, Germany, Sept. 14-17, 2005. 50 Suppl Part 1: pp. 360-361
|
398.
Assessment of different computational models for generation of x-ray spectra in diagnostic radiology and mammography
M.R. Ay, S. Sarkar, M. Shahriari, D. Sardari, and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Medical Physics, 32(6), pp. 1660-1675, 2005
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399.
Development and validation of MCNP4C-based Monte Carlo simulator for fan- and cone-beam x-ray CT
M.R. Ay and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine and Biology, 2005. 50(20): pp. 4863-4885
|
400.
Comparative assessment of different computational models for generation of x-ray spectra in diagnostic radiology and mammography
M.R. Ay, S. Sarkar, M. Shahriari, D. Sardari, and H. Zaidi
|
|
Proceeding and Conference Record
|
|
IEEE Nuclear Science Symposium & Medical Imaging Conference. 2004. Oct. 19-22, Rome, Italy. 4: pp. 4190-4194
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401.
Estimating of patient dose in abdomen-pelvis CT exam as a function of scan techniques in single and multi-slice speiral CT by Monte Carlo method
M.R. Ay, S. Sarkar, M. Shahriari, and P. Ghafarian
|
|
|
2th International Conference on Nuclear Science and Technology in Iran. Shiraz, Iran, 27-30 April 2004, p. 46
|
402.
Measurement of Organ Dose in Abdomen-Pelvis CT Exam as a Function of mA, KVp and Scanner Type by Monte Carlo Method
M.R. Ay, S. Sarkar, M. Shahriari and P. Ghafarian
|
|
Peer-reviewed Journal Publication
|
|
Iranian J. of Radiation Research, 1(4), 187-194, 2004
|
403.
Monte Carlo simulation of x-ray spectra in diagnostic radiology and mammography using MCNP4C
M.R. Ay, M. Shahriari, S. Sarkar, M. Adib and H. Zaidi
|
|
Peer-reviewed Journal Publication
|
|
Physics in Medicine and Biology, 49(19) pp. 4897-4917, 2004
|
404.
Measurement of organ dose in abdomen-pelvis CT exams as a function of mA, KVp and scanner type by Monte Carlo method
M.R. Ay, M. Shahriari, S. Sarkar, and P. Ghafarian
|
|
|
3ed International Conference of The Effect of Low and Very Low Doses of Ionizing Radiation on Human Health. Tehran, Iran , 21-23 October 2003, p. 53
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405.
Development of a Monte Carlo simulation package for scintillation cameras operation in single photon and coincidence imaging mode
M.R. Ay, M. Adib, and H. Zaidi
|
|
|
Annual Congress of the European Association of Nuclear Medicine (EANM03). Amsterdam, The Netherlands, 23-28 August 2003, p. S326-S327
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406.
Cyclotrons in nuclear medicine, in Comprehensive book on Radiology, Nuclear Medicine and Therapy Systems
M.R. Ay
|
|
|
J. Shokohi, A.A. Ameri, and H.R. Sagha, Editors. 2003, Andishe Rafi Publisher: Tehran, Iran. pp. 1742-1756
|
407.
Image fusion in nuclear medicine
M.R. Ay
|
|
|
7th Annual Meeting of Nuclear Medicine. Tehran, Iran, 2003: p. 45
|
408.
Introduction to PET and PET/CT systems, in Comprehensive book on Radiology, Nuclear Medicine and Therapy Systems
M.R. Ay
|
|
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J. Shokohi, A.A. Ameri, and H.R. Sagha, Editors. 2003, Andishe Rafi Publisher: Tehran, Iran. pp. 1757-1781
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409.
Comparison of PET detectors
M.R. Ay
|
|
|
6th Annual Meeting of Nuclear Medicine. Mashhad, Iran 2002, p. 31
|
410.
Steps toward building a PET center
M.R. Ay
|
|
|
6th Annual Meeting of Nuclear Medicine. Mashhad, Iran 2002, p. 29
|
411.
Providing software for PET (Coincidence) 3D simulation using Monte Carlo method
M.R. Ay and M.E. Ashrafi
|
|
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International Conference on Radiation and its Role in Diagnosis and Treatment (FICR2000). Tehran, Iran, 14-18 October 2000, p. 51
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