Tehran University of Medical Sciences

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Faculty Members have conducted research related to the Cortical Thickness Analysis in Temporal Lobe Epilepsy Using Fully Bayesian Spectral Method in Magnetic Resonance Imaging
Mohammad Reza Ay
Mohammad Reza Ay

Professor of Medical Physics

Department Biomedical Engineering & Medical Physics

School of Medicine

Research Center for Molecular and Cellular Imaging

Tehran University of Medical Sciences

All Documents
1. Attention-Based Deep Neural Network for Partial Volume Correction in Brain 18F-Fdg Pet Imaging, Physica Medica (2024)
2. Design and Performance Evaluation of Partial Geometry Configurations of Total-Body Pet: A Monte Carlo Study, Iranian Journal of Nuclear Medicine (2024)
3. Development of Novel Low-Cost Readout Electronics for Large Field-Of-View Gamma Camera Detectors, Physica Medica (2024)
4. Multimodality Radiomics Prediction of Radiotherapy-Induced the Early Proctitis and Cystitis in Rectal Cancer Patients: A Machine Learning Study, Biomedical Physics and Engineering Express (2024)
5. The Effect of Harmonization on the Variability of Pet Radiomic Features Extracted Using Various Segmentation Methods, Annals of Nuclear Medicine (2024)
6. Accurate Modeling and Performance Evaluation of a Total-Body Pet Scanner Using Monte Carlo Simulations, Medical Physics (2023)
7. Attenuation Correction for Dedicated Cardiac Spect Imaging Without Using Transmission Data; [Transmisyon Verilerini Kullanmadan Ozel Kardiyak Spect Goruntulemede Atenuasyon Duzeltmesi], Molecular Imaging and Radionuclide Therapy (2023)
8. Evaluation and Optimization of Geometry Parameters of Gagg Scintillator-Based Compton Camera for Medical Imaging by Monte Carlo Simulation, Journal of Instrumentation (2023)
9. Impact of Random and Scattered Coincidences From Outside of Field of View on Positron Emission Tomography/Computed Tomography Imaging With Different Reconstruction Protocols, Nuclear Science and Techniques (2023)
10. Phantom and Clinical Evaluation of Block Sequential Regularized Expectation Maximization (Bsrem) Reconstruction Algorithm in 68Ga-Psma Pet-Ct Studies, Physical and Engineering Sciences in Medicine (2023)
11. Realizing 32-Time Scan Duration Reduction of 18F-Fdg Pet Using Deep Learning Model With Image Augmentation, Frontiers in Biomedical Technologies (2023)
12. Reducing Scan Time Using Time-Of-Flight Protocol in Clinical [18F]Fdg-Pet/Ct Imaging: A Feasibility Study, Iranian Journal of Nuclear Medicine (2023)
13. 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, Iranian Journal of Radiology (2023)
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, EJNMMI Physics (2023)
15. A Deep Learning Method for High-Quality Ultra-Fast Ct Image Reconstruction From Sparsely Sampled Projections, Nuclear Instruments and Methods in Physics Research# Section A: Accelerators# Spectrometers# Detectors and Associated Equipment (2022)
16. A Novel Approach for Extracting Functional Brain Networks Involved in Mesial Temporal Lobe Epilepsy Based on Self Organizing Maps, Informatics in Medicine Unlocked (2022)
17. A Novel Approach for Extracting Functional Brain Networks Involved in Mesial Temporal Lobe Epilepsy Based on Self Organizing Maps, Informatics in Medicine Unlocked (2022)
18. Endorectal Ultrasound Radiomics in Locally Advanced Rectal Cancer Patients: Despeckling and Radiotherapy Response Prediction Using Machine Learning, Abdominal Radiology (2022)
19. Generation of 18F-Fdg Pet Standard Scan Images From Short Scans Using Cycle-Consistent Generative Adversarial Network, Physics in Medicine and Biology (2022)
20. Harmonization Based on Quantitative Analysis of Standardized Uptake Value Variations Across Pet/Ct Scanners: A Multicenter Phantom Study, Nuclear Medicine Communications (2022)
21. Impact of Various Image Reconstruction Methods on Joint Compensation of Respiratory Motion and Partial Volume Effects in Whole-Body18f-Fdg Pet/Ct Imaging: Patients With Non-Small Cell Lung Cancer, Iranian South Medical Journal (2022)
22. Pars-Net: A Novel Deep Learning Framework Using Parallel Residual Conventional Neural Networks for Sparse-View Ct Reconstruction, Journal of Instrumentation (2022)
23. Potential Advantages of Fdg-Pet Radiomic Feature Map for Target Volume Delineation in Lung Cancer Radiotherapy, Journal of Applied Clinical Medical Physics (2022)
24. Statistical Analysis of Covid-19 Infection Severity in Lung Lobes From Chest Ct, Informatics in Medicine Unlocked (2022)
25. Synergistic Impact of Motion and Acquisition/Reconstruction Parameters on 18F-Fdg Pet Radiomic Features in Non-Small Cell Lung Cancer: Phantom and Clinical Studies, Medical Physics (2022)
26. The Necessity of Development and Manufacturing of Dedicated Brain Pet Scanners, Frontiers in Biomedical Technologies (2022)
27. A Deep Neural Network to Recover Missing Data in Small Animal Pet Imaging: Comparison Between Sinogram-And Image-Domain Implementations, Proceedings - International Symposium on Biomedical Imaging (2021)
28. A Novel Attention-Based Convolutional Neural Network for Joint Denoising and Partial Volume Correction of Low-Dose Pet Images, 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record# NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors# RTSD 2022 (2021)
29. Accurate Monte Carlo Modeling and Performance Evaluation of a Total-Body Pet Scanner, 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record# NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors# RTSD 2022 (2021)
30. Atb-Net: A Novel Attention-Based Convolutional Neural Network for Predicting Full-Dose From Low-Dose Pet Images, 2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record# NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors# RTSD 2022 (2021)
31. 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, Annals of Nuclear Medicine (2021)
32. Dynamic Functional Connectivity in Temporal Lobe Epilepsy: A Graph Theoretical and Machine Learning Approach, Neurological Sciences (2021)
33. Dynamic Functional Connectivity in Temporal Lobe Epilepsy: A Graph Theoretical and Machine Learning Approach, Neurological Sciences (2021)
34. Evaluation of Gamma and Electron Radiations Impact on Vitamins for Onion Preservation, Applied Radiation and Isotopes (2021)
35. Introducing a Novel Polyvinyl Chloride/Tungsten Composites for Shielding Against Gamma and X-Ray Radiations, Iranian Journal of Nuclear Medicine (2021)
36. Introducing the Gammapen: All-In-One Gamma Probe for Sentinel Lymph Node Biopsy, Frontiers in Biomedical Technologies (2021)
37. Leveraging Deep Neural Networks to Improve Numerical and Perceptual Image Quality in Low-Dose Preclinical Pet Imaging, Computerized Medical Imaging and Graphics (2021)
38. Standard Spect Myocardial Perfusion Estimation From Half-Time Acquisitions Using Deep Convolutional Residual Neural Networks, Journal of Nuclear Cardiology (2021)
39. Standard-Dose Pet Reconstruction From Low-Dose Preclinical Images Using an Adopted All Convolutional U-Net, Progress in Biomedical Optics and Imaging - Proceedings of SPIE (2021)
40. Temporal and Extratemporal Atrophic Manifestation of Temporal Lobe Epilepsy Using Voxel-Based Morphometry and Corticometry: Clinical Application in Lateralization of Epileptogenic Zone, Neurological Sciences (2021)
41. Temporal and Extratemporal Atrophic Manifestation of Temporal Lobe Epilepsy Using Voxel-Based Morphometry and Corticometry: Clinical Application in Lateralization of Epileptogenic Zone, Neurological Sciences (2021)
42. The Impact of Preprocessing on the Pet-Ct Radiomics Features in Non-Small Cell Lung Cancer, Frontiers in Biomedical Technologies (2021)
43. 6Th Anniversary Editorial, Frontiers in Biomedical Technologies (2020)
44. Advances in Preclinical Pet Instrumentation, PET Clinics (2020)
45. Computationally Efficient System Matrix Calculation Techniques in Computed Tomography Iterative Reconstruction, Journal of Medical Signals and Sensors (2020)
46. Corrigendum to “Targeted Gold Nanoparticles Enable Molecular Ct Imaging of Head and Neck Cancer: An in Vivo Study” (International Journal of Biochemistry and Cell Biology (2019) 114, (S1357272519301256), (10.1016/J.Biocel.2019.06.002)), International Journal of Biochemistry and Cell Biology (2020)
47. Deep-Jasc: Joint Attenuation and Scatter Correction in Whole-Body 18F-Fdg Pet Using a Deep Residual Network, European Journal of Nuclear Medicine and Molecular Imaging (2020)
48. Guidelines for Tms/Tes Clinical Services and Research Through the Covid-19 Pandemic, Brain Stimulation (2020)
49. Measurement of Radiation Exposure to Caregivers of Patients With Thyroid Diseases Treated With Iodine-131: A Review, Frontiers in Biomedical Technologies (2020)
50. Molecular Imaging Approaches in the Diagnosis of Breast Cancer: A Systematic Review and Meta-Analysis, Iranian Journal of Nuclear Medicine (2020)
51. Novel Preclinical Pet Geometrical Concept Using a Monolithic Scintillator Crystal Offering Concurrent Enhancement in Spatial Resolution and Detection Sensitivity: A Simulation Study, Physics in Medicine and Biology (2020)
52. Performance Evaluation of Developed Dedicated Breast Pet Scanner and Improvement of the Spatial Resolution by Wobbling: A Monte Carlo Study, Japanese Journal of Radiology (2020)
53. Radiation Dose Assessment to Family Members Taking Care of Non-Cancerous Thyroid Patients Treated With I-131 Therapy in Nuclear Medicine Department, Radiation Protection Dosimetry (2020)
54. The Impact of Iterative Reconstruction Protocol, Signal-To-Background Ratio and Background Activity on Measurement of Pet Spatial Resolution, Japanese Journal of Radiology (2020)
55. Towards Quantitative Small-Animal Imaging on Hybrid Pet/Ct and Pet/Mri Systems, Clinical and Translational Imaging (2020)
56. Validation and Evaluation of a Gate Model for Mammi Pet Scanner, Iranian Journal of Nuclear Medicine (2020)
57. A Full Quantitative Analysis of 18 Mv Photon Beam From 2100 C/D-Varian Clinical Linear Accelerator With and Without Flattening Filter, International Journal of Radiation Research (2019)
58. A Novel Approach to Automatic Position Calibration for Pixelated Crystals in Gamma Imaging, Iranian Journal of Nuclear Medicine (2019)
59. A Novel Method for Measuring the Mtf of Ct Scanners: A Phantom Study, Medical Measurements and Applications# MeMeA 2019 - Symposium Proceedings (2019)
60. Design and Performance Evaluation of High Resolution Small Animal Pet Scanner Based on Monolithic Crystal: A Simulation Study, Journal of Instrumentation (2019)
61. Design and Performance Evaluation of Spheroid Geometry for Brain Pet Scanner Using Monte Carlo Modeling, Iranian Journal of Nuclear Medicine (2019)
62. Design, Optimization and Performance Evaluation of Bm-Pet: A Simulation Study, Nuclear Instruments and Methods in Physics Research# Section A: Accelerators# Spectrometers# Detectors and Associated Equipment (2019)
63. Development and Preliminary Results of Xtrim-Pet, a Modular Cost-Effective Preclinical Scanner, Nuclear Instruments and Methods in Physics Research# Section A: Accelerators# Spectrometers# Detectors and Associated Equipment (2019)
64. Direct Attenuation Correction of Brain Pet Images Using Only Emission Data Via a Deep Convolutional Encoder-Decoder (Deep-Dac), European Radiology (2019)
65. Dual-Energy Ct Imaging of Nasopharyngeal Cancer Cells Using Multifunctional Gold Nanoparticles, IET Nanobiotechnology (2019)
66. Evaluation of the Impact of Out-Of-Axial Fov Scattering Medium on Random Coincidence Rates on Discovery 690 Pet/Ct Scanner: A Simulation Study, Frontiers in Biomedical Technologies (2019)
67. Feasibility of a Novel Design of a High Resolution/Sensitivity Animal Pet Scanner Using Thick and Thin Arrangement of Monolithic Scintillators, 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference# NSS/MIC 2019 (2019)
68. Impact of Image Reconstruction Methods on Quantitative Accuracy and Variability of Fdg-Pet Volumetric and Textural Measures in Solid Tumors, European Radiology (2019)
69. Introducing a Dedicated Cardiac Spect Imaging System: Prospect, Frontiers in Biomedical Technologies (2019)
70. Joint Compensation of Motion and Partial Volume Effects by Iterative Deconvolution Incorporating Wavelet-Based Denoising in Oncologic Pet/Ct Imaging, Physica Medica (2019)
71. Mcnp-Fbsm: Development of Mcnp/Mcnpx Source Model for Simulation of Multi-Slice Fan-Beam X-Ray Ct Scanners, Medical Measurements and Applications# MeMeA 2019 - Symposium Proceedings (2019)
72. Monte Carlo-Based Optimization of a Gamma Probe System for Sentinel Lymph Node Mapping, Iranian Journal of Nuclear Medicine (2019)
73. Nema Nu-4 2008 Performance Evaluation of Xtrim-Pet: A Prototype Sipm-Based Preclinical Scanner, Medical Physics (2019)
74. Sparse-View Statistical Image Reconstruction With Improved Total Variation Regularization for X-Ray Micro-Ct Imaging, Journal of Instrumentation (2019)
75. Targeted Gold Nanoparticles Enable Molecular Ct Imaging of Head and Neck Cancer: An in Vivo Study, International Journal of Biochemistry and Cell Biology (2019)
76. Techniques for Generating Attenuation Map Using Cardiac Spect Emission Data Only: A Systematic Review, Annals of Nuclear Medicine (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, Iranian Journal of Nuclear Medicine (2019)
78. A Generic, Scalable, and Cost-Effective Detector Front-End Block for Pet, 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference# NSS/MIC 2017 - Conference Proceedings (2018)
79. A Novel Dual Energy Method for Enhanced Quantitative Computed Tomography, Journal of Instrumentation (2018)
80. An Alternative Mathematical Modeling of the Scintillation Camera and Framework for Performance Analysis of Gamma-Ray Positioning Algorithms, Iranian Journal of Nuclear Medicine (2018)
81. 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, Molecular Imaging (2018)
82. Cardiac Contraction Motion Compensation in Gated Myocardial Perfusion Spect: A Comparative Study, Physica Medica (2018)
83. Concept Design and Monte Carlo Performance Evaluation of Headphonepet: A Novel Brain-Dedicated Pet System Based on Partial Cylindrical Detectors, Journal of Instrumentation (2018)
84. Development of a Preclinical Pet System Based on Pixelated Lyso Crystals and Sipm Arrays, 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference# NSS/MIC 2017 - Conference Proceedings (2018)
85. Evaluating the Impact of Various Parameters on the Gamma Index Values of 2D Diode Array in Imrt Verification, Journal of Medical Signals and Sensors (2018)
86. Evaluation of Size, Morphology, Concentration, and Surface Effect of Gold Nanoparticles on X-Ray Attenuation in Computed Tomography, Physica Medica (2018)
87. Folic Acid-Cysteamine Modified Gold Nanoparticle As a Nanoprobe for Targeted Computed Tomography Imaging of Cancer Cells, Materials Science and Engineering C (2018)
88. Generic High Resolution Pet Detector Block Using 12 × 12 Sipm Array, Biomedical Physics and Engineering Express (2018)
89. Is Correction for Metallic Artefacts Mandatory in Cardiac Spect/Ct Imaging in the Presence of Pacemaker and Implantable Cardioverter Defibrillator Leads?, Iranian Journal of Nuclear Medicine (2018)
90. Mixture Model Based Joint-Map Reconstruction of Attenuation and Activity Maps in Tof-Pet, Journal of Instrumentation (2018)
91. Reconstruction/Segmentation of Attenuation Map in Tof-Pet Based on Mixture Models, Annals of Nuclear Medicine (2018)
92. Recovery of Missing Data in Partial Geometry Pet Scanners: Compensation in Projection Space Vs Image Space, Medical Physics (2018)
93. The Influence of Using Different Reconstruction Algorithms on Sensitivity of Quantitative 18F-Fdg-Pet Volumetric Measures to Background Activity Variation, Iranian Journal of Nuclear Medicine (2018)
94. Uncertainties in Effective Dose Estimation for Ct Transmission Scan in Total Body Pet-Ct Imaging With Auto Ma3d Tube Current Modulation, International Journal of Radiation Research (2018)
95. A Hybrid Tracking System for Image-Guided Spine Surgery Using a Tracked Mobile C-Arm: A Phantom Study, Turkish Journal of Electrical Engineering and Computer Sciences (2017)
96. Collimator-Detector Response Compensation in Molecular Spect Reconstruction Using Stir Framework, Iranian Journal of Nuclear Medicine (2017)
97. Compton Scatter Tomography in Tof-Pet, Physics in Medicine and Biology (2017)
98. Development and Calibration of a New Gamma Camera Detector Using Large Square Photomultiplier Tubes, Journal of Instrumentation (2017)
99. Development and Validation of an Accurate Gate Model for Neuropet Scanner, Physica Medica (2017)
100. Evaluation of Radiation Exposure to Staff and Environment Dose From [18F]-Fdg in Pet/Ct and Cyclotron Center Using Thermoluminescent Dosimetry, Journal of Biomedical Physics and Engineering (2017)
101. Grid Block Design Based on Monte Carlo Simulated Dosimetry, the Linear Quadratic and Hug-Kellerer Radiobiological Models, Journal of Medical Physics (2017)
102. How Crystal Configuration Affects the Position Detection Accuracy in Pixelated Molecular Spect Imaging Systems?, Nuclear Science and Techniques (2017)
103. Impact of Time-Of-Flight and Point-Spread-Function for Respiratory Artifact Reduction in Pet/Ct Imaging: Focus on Standardized Uptake Value, Tanaffos (2017)
104. Implementation of Absolute Quantification in Small-Animal Spect Imaging: Phantom and Animal Studies, Journal of Applied Clinical Medical Physics (2017)
105. Monte Carlo Optimization of Crystal Configuration for Pixelated Molecular Spect Scanners, Nuclear Instruments and Methods in Physics Research# Section A: Accelerators# Spectrometers# Detectors and Associated Equipment (2017)
106. 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, Annals of Nuclear Medicine (2017)
107. New Approach for Calibration of Pixelated Scintillation Detectors of Intraoperative Gamma Cameras, Iranian Journal of Nuclear Medicine (2017)
108. Quantification and Reduction of Respiratory Induced Artifacts in Positron Emission Tomography/Computed Tomography Using the Time-Of-Flight Technique, Nuclear Medicine Communications (2017)
109. Quantification of the Impact of Tof and Psf on Pet Images Using the Noise-Matching Concept: Clinical and Phantom Study, Nuclear Science and Techniques (2017)
110. Single Ste-Mr Acquisition in Mr-Based Attenuation Correction of Brain Pet Imaging Employing a Fully Automated and Reproducible Level-Set Segmentation Approach, Molecular Imaging and Biology (2017)
111. Spinning Slithole Collimation for High-Sensitivity Small Animal Spect: Design and Assessment Using Gate Simulation, Physica Medica (2017)
112. Design and Assessment of a Novel Spect System for Desktop Open-Gantry Imaging of Small Animals: A Simulation Study, Medical Physics (2016)
113. Design and Development of a Dedicated Portable Gamma Camera System for Intra-Operative Imaging, Physica Medica (2016)
114. Development and Characterization of a Compact Hand-Held Gamma Probe System, Surgeoguide, Based on Nema Nu3-2004 Standards, Journal of Instrumentation (2016)
115. 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, Molecular Imaging and Biology (2015)
116. Generation of Mr-Based Attenuation Correction Map of Pet Images in the Brain Employing Joint Segmentation of Skull and Soft-Tissue From Single Short-Te Mr Imaging Modality, Lecture Notes in Computational Vision and Biomechanics (2015)
117. Monte Carlo Calculation of Neutron Doses to Organs of a Female Undergoing a Pelvic 18 Mv Irradiation, Biomedical and Pharmacology Journal (2015)
118. 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, Physica Medica (2015)
119. The Effects of Backscattered Radiation Into Beam Monitor Chamber: Study of 6 and 18 Mv Conventional and Removed Flattening Filter Clinical Accelerator, Biomedical and Pharmacology Journal (2015)
120. The Effects of Backscattered Radiation Into Beam Monitor Chamber: Study of 6 and 18 Mv Conventional and Removed Flattening Filter Clinical Accelerator, Biosciences Biotechnology Research Asia (2015)