Dr. Pardis Ghafarian

Associate Professor, PhD

Shahid Beheshti University of Medical Sciences

Email: pardis.ghafarian@sbmu.ac.ir

Biography

I am Associate Professor, PhD (Senior Clinical Physicist) at PET/CT and Cyclotron Center, Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. My main research field is attenuation correction in emission tomography imaging systems.

Date of Birth: 22/03/1978

Nationality: Iranian

Marital Status: Married

Email: pardis.ghafarian@sbmu.ac.ir

Academic Background

1996 - 2000  BSc Degree in Physics
Faculty of Physics & Nuclear Sciences, Tehran Polytechnic University, Tehran, Iran

2002 - 2005  MSc Degree in Medical Physics
Department of Medical Physics, Iran University of Medical Sciences
Thesis: "Monte Carlo calculation of x-ray scatter distribution and design a grid with optimal performance in diagnostic radiology", Supervisor: Dr. AA Sharafi

2004 - 2005  
Division of Nuclear Medicine, Geneva University Hospital, Trainee

2006 - 2010  PhD Degree in Radiation Medicine
Department of Radiation Medicine, Shahid Beheshti University
Thesis: "Quantification and Reduction of CT-Based Attenuation Correction Artifacts in Cardiac PET/CT Imaging" Supervisor: Dr. Aghamiri and Dr. Habib Zaidi

2008 - 2010  Research Assistant
Division of Nuclear Medicine, Geneva University Hospital

Publications:

Journal Papers

1- Abbas Monsef, Peyman Sheikhzadeh, Joseph Steiner, Fatemeh Sadeghi, Mohammadreza Yazdani, Pardis Ghafarian "Optimizing Scan Time and Bayesian Penalized Likelihood Reconstruction Algorithm in Copper-64 PET/CT Imaging: A Phantom Study", Biomedical Physics & Engineering Express,2024

2- Seyyed Ali Hosseini, Isaac Shiri, Pardis Ghaffarian, Ghasem Hajianfar, Atlas Haddadi Avval, Milad Seyfi, Stijn Servaes, Pedro Rosa-Neto, Habib Zaidi, Mohammad Reza Ay "The effect of harmonization on the variability of PET radiomic features extracted using various segmentation methods", Annals of Nuclear Medicine,2024,P 1-15

3- Hadi Rezaei, Peyman Sheikhzadeh, Pardis Ghafarian, Mohammad Reza Ay, Mohammad Reza Ay "Article History",

4- Hadi Rezaei, Peyman Sheikhzadeh, Pardis Ghafarian, Mohammad Reza Ay "Design and performance evaluation of partial geometry configurations of total-body PET: A Monte Carlo study", Iranian Journal of Nuclear Medicine,2023

5- Mahak Osouli Alamdari, Pardis Ghafarian, Arman Rahmim, Mehrdad Bakhshayesh-Karam, Mohammad Reza Ay "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, V34,P 1-13

6- Hossein Rahimzadeh, Hadi Kamkar, Pardis Ghafarian, Narges Hoseini-Tabatabaei, Neda Mohammadi-Mobarakeh, Jafar Mehvari-Habibabadi, Seyed-Sohrab Hashemi-Fesharaki & Mohammad-Reza Nazem-Zadeh "Exploring ASL perfusion MRI as a substitutive modality for 18F-FDG PET in determining the laterality of mesial temporal lobe epilepsy", Neurological Sciences,2023

7- Hamidreza Hemmati, Alireza Kamali-Asl, Pardis Ghafarian, Arman Rahmim, Habib Zaidi8, and Mohammad Reza Ay "List-mode quantitative joint reconstruction of activity and attenuation maps in Time-of-Flight PET", Journal of Instrumentation

8- Hadi Rezaei , Peyman Sheikhzadeh, Pardis Ghafarian, Habib Zaidi , Mohammad Reza Ay "Accurate modeling and performance evaluation of a total-body pet scanner using Monte Carlo simulations", Medical Physics

9- samira Rezvani , avatar Pardis Ghafarian * , avatar Mehrdad Bakhshayesh Karam, avatar Mohammadreza Ay "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,

10- Pardis Ghafarian1 , Sahar Rezaei * 2, Esmaeil Gharepapagh3, Saeid Sarkar4, Mohammad Reza Ay4 " 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", Iran South Med J 2022, 25(4): 355-370

11- Roya Sharifpour, Pardis Ghafarian, Mehrdad Bakhshayesh-Karam, Carlos F Uribe, Arman Rahmim, Mohammad Reza Ay "Reducing scan time using time-of-flight protocol in clinical [18F] FDG-PET/CT imaging: A feasibility study", Iranian Journal of Nuclear Medicine,2022,P 1-16

12- Pardis Ghafarian "Recent advances in quantitative PET imaging", Frontiers in Biomedical Technologies,2022,P159-159

13- Abbas Monsef, Mohammad Reza Ay, Peyman Sheikhzadeh, Parham Geramifar, Arman Rahmim, Pardis Ghafarian "Harmonization based on quantitative analysis of standardized uptake value variations across PET/CT scanners: a multicenter phantom study", Nuclear Medicine Communications,2022,V 43, P 1004-1014

14- Seyyed Ali Hosseini, Isaac Shiri, Ghasem Hajianfar, Bahador Bahadorzade, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay "Synergistic impact of motion and acquisition/reconstruction parameters on 18F‐FDG PET radiomic features in non‐small cell lung cancer: phantom and clinical …", Medical Physics,2022

15- Seyyed Ali Hosseini, Isaac Shiri, Ghasem Hajianfar, Pardis Ghafarian, Mehrdad Bakhshayesh Karam, Mohammad Reza Ay "The Impact of Preprocessing on the PET-CT Radiomics Features in Non-small Cell Lung Cancer", Frontiers in Biomedical Technologies, 2021, V 8

16- Mahsa Amirrashedi, Saeed Sarkar, Hojjat Mamizadeh, Hossein Ghadiri, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay "Leveraging Deep Neural Networks to Improve Numerical and Perceptual Image Quality in, Low-dose Preclinical PET Imaging", Computerized Medical Imaging and Graphics, 2021,P 102010

17- Mohammad Amin Mosleh-Shirazi, Zahra Nasiri-Feshani, Pardis Ghafarian, Mehrosadat Alavi, Gholamhasan Haddadi, Ali Ketabi "Tumor volume-adapted SUV N as an alternative to SUV peak for quantification of small lesions in PET/CT imaging: a proof-of-concept study", Japanese Journal of Radiology,2021, P 1-13

18- Pardis Ghafarian1 , Sahar Rezaei * 2, Esmaeil Gharepapagh3, Saeid Sarkar4, Mohammad Reza Ay4 " 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", Iran South Med J 2022, 25(4): 355-370

19- Pardis Ghafarian1 , Sahar Rezaei * 2, Esmaeil Gharepapagh3, Saeid Sarkar4, Mohammad Reza Ay4 "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", Iran South Med J 2022, 25(4): 355-370

20- Elham Kashian, Hadi Taleshi Ahangari, Vahab Dehlaghi, Karim Khoshgard, Pardis Ghafarian, Raheb Ghorbani "Monte Carlo simulation and performance assessment of GE Discovery 690 VCT positron emission tomography/computed tomography scanner", World Journal of Nuclear Medicine, 2020, Vol 19, P 366

21- Azadeh Emami, Hossein Ghadiri, Pardis Ghafarian, Parham Geramifar, Mohammad Reza Ay "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, Vol 38, P 790-799

22- Sahar Rezaei, Pardis Ghafarian, Mehrdad Bakhshayesh-Karam, Carlos F Uribe, Arman Rahmim, Saeed Sarkar, Mohammad Reza Ay "The impact of iterative reconstruction protocol, signal-to-background ratio and background activity on measurement of PET spatial resolution", Japanese journal of radiology, 2020, Vol 38,P 231-239

23- Isaac Shiri, Hossein Arabi, Parham Geramifar, Ghasem Hajianfar, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay, Habib Zaidi "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, Vol 47,

24- Getu Ferenji Tadesse, Parham Geramifar, Pardis Ghafarian, Eshetu Ejeta Cheka, Eyachew Misgana Tegaw, Seifu Gizaw Feyisa, Ramin Sadeghi, Mohammad Reza Ay "Molecular imaging approaches in the diagnosis of breast cancer: A systematic review and meta-analysis", Iranian Journal of Nuclear Medicine,2020,Vol 28,P 1-13

25- Azadeh Emami, Pardis Ghafarian, Hossien Ghadiri, Parham Geramifar, Mohammad Reza Ay "Validation and evaluation of a GATE model for MAMMI PET scanner", Iranian Journal of Nuclear Medicine, 2020, Vol 28, P 33-38

26- Mahak Osouli Alamdari, Pardis Ghafarian, Parham Geramifar, Mohammad Reza Ay "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, V 6, P 181-186

27- Isaac Shiri, Pardis Ghafarian, Parham Geramifar, Kevin Ho-Yin Leung, Mostafa Ghelichoghli, Mehrdad Oveisi, Arman Rahmim, Mohammad Reza Ay "Direct attenuation correction of brain PET images using only emission data via a deep convolutional encoder-decoder (Deep-DAC)", European radiology, 2019, V 29, P 6867-6879

28- Sahar Rezaei, Pardis Ghafarian, Abhinav K Jha, Arman Rahmim, Saeed Sarkar, Mohammad Reza Ay "Joint compensation of motion and partial volume effects by iterative deconvolution incorporating wavelet-based denoising in oncologic PET/CT imaging", Physica Medica, 2019, V 68, P 52-60

29- Mahsa Amirrashedi, Saeed Sarkar, Pardis Ghafarian, Reza Hashemi Shahraki, Parham Geramifar, Habib Zaidi, Mohammad Reza Ay "NEMA NU‐4 2008 performance evaluation of Xtrim‐PET: A prototype SiPM‐based preclinical scanner", Medical physics, 2019, V 46, P 4816-4825

30- Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Pardis Ghafarian, Mohammad Reza Ay "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, V 940, P274-282

31- Leila Saleki, Pardis Ghafarian, Ahmad Bitarafan-Rajabi, Nahid Yaghoobi, Babak Fallahi, Mohammad Reza Ay "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, V 27, P 63-72

32- Peyman Sheikhzadeh, Hossein Ghadiri, Parham Geramifar, Pardis Ghafarian, Mohammad Reza Ay "Design and performance evaluation of spheroid geometry for brain PET scanner using Monte Carlo modeling", Iranian Journal of Nuclear Medicine, 2019

33- Isaac Shiri, Kevin Leung, Pardis Ghafarian, Parham Geramifar, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim "HiResPET: high resolution PET image generation using deep convolution encoder decoder network", Journal of Nuclear Medicine, 2019, V 60, P1368-1368

34- Isaac Shiri, Kevin Leung, Pardis Ghafarian, Parham Geramifar, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim "Simultaneous Attenuation Correction and Reconstruction of PET Images Using Deep Convolutional Encoder Decoder Networks from Emission Data", Journal of Nuclear Medicine, 2019,V 60, P 1370-1370

35- Isaac Shiri, Kevin Leung, Parham Geramifar, Pardis Ghafarian, Mehrdad Oveisi, Mohammad Reza Ay, Arman Rahmim " PSFNET: ultrafast generation of PSF-modelled-like PET images using deep convolutional neural network", Journal of Nuclear Medicine, 2019 , V 60, P 1369-1369

36- Ali Ketabi, Pardis Ghafarian, Mohammad Amin Mosleh-Shirazi, Seyed Rabi Mahdavi, Arman Rahmim, Mohammad Reza Ay "Impact of image reconstruction methods on quantitative accuracy and variability of FDG-PET volumetric and textural measures in solid tumors", European radiology, 2019, Vol 29, P 2146-2156

37- Yazdan Salimi, MohammadReza Deevband, Pardis Ghafarian "Assessment the effect of CT localizer parameter on radiation dose and image quality of GE CT spiral images, A phantom study", Iranian Journal of Medical Physics, 2018, Vol 15, P 323

38- Elham Kashian, Hadi Taleshi Ahangari, Vahab Dehlaghi, Karim Khoshgard, Pardis Ghafarian, Hossein Mousavie Anijdan, Shiva Zarifi "Evaluation of methods of co-segmentation on PET/CT images of lung tumor: simulation study", Iranian Journal of Medical Physics,2018, Vol 15, P 35

39- Hanieh Sadat Jozi, Pardis Ghafarian "Quantitative evaluation of TOF benefits indifferent tumor regions of Overweight patients in clinical PET/CT scanner", Iranian Journal of Medical Physics, 2018, Vol 15,P 84

40- Y Salimi, MR Deevband, P Ghafarian, MR Ay "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,Vol 16, P465-472

41- Hamidreza Hemmati, Alireza Kamali-Asl, Pardis Ghafarian, Mohammad Reza Ay "Reconstruction/segmentation of attenuation map in TOF-PET based on mixture models", Annals of nuclear medicine, Vol 32, P474-484

42- Mehdi Shirin Shandiz, Hamid Saligheh Rad, Pardis Ghafarian, Khadijeh Yaghoubi, Mohammad Reza Ay "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, Vol 17,

43- P Sheikhzadeh, H Sabet, H Ghadiri, P Geramifar, P Ghafarian, MR Ay "Concept design and Monte Carlo performance evaluation of HeadphonePET: a novel brain-dedicated PET system based on partial cylindrical detectors", Journal of Instrumentation,2018,Vol 13, P07008

44- H Hemmati, A Kamali-Asl, P Ghafarian, MR Ay "Mixture model based joint-MAP reconstruction of attenuation and activity maps in TOF-PET", Journal of Instrumentation,2018,Vol 13

45- Yasmin Yaraghi, Iraj Jabbari, Ali Akhavan, Pardis Ghaffarian, Shahram Monadi, Mohsen Saeb "Comparison of PET/CT and CT-based tumor delineation and its effects on the radiation treatment planning for non-small cell lung cancer", Iranian Journal of Nuclear Medicine,2018,Vol 26, P9-15

46- Ali Ketabi, Pardis Ghafarian, Mohammad Amin Mosleh-Shirazi, Seyed Rabi Mahdavi, Mohammad Reza Ay "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, Vol 26, P87-97

47- Zahra Etemadi, Pardis Ghafarian, Ahmad Bitarafan-Rajabi, Hadi Malek, Arman Rahmim, Mohammad Reza Ay "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,2017, Vol 26, P 35-46

48- M Shekari, P Ghafarian, S Ahangari, MR Ay "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,Vol 11, P 1-8

49- Hamidreza Hemmati, Alireza Kamali-Asl, Mohammadreza Ay, Pardis Ghafarian "Compton scatter tomography in TOF-PET", Physics in Medicine & Biology,2017,Vol 62, P 7641

50- Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Hojjat Mahani, Pardis Ghafarian, Mohammad Reza Ay "Development and validation of an accurate GATE model for NeuroPET scanner", Physica Medica,2017, Vol 4, P 56-65

51- Shabnam Khorasani Gerdekoohi, Naser Vosoughi, Kaveh Tanha, Majid Assadi, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay "mplementation of absolute quantification in small‐animal SPECT imaging: Phantom and animal studies", Journal of applied clinical medical physics,2017,Vol 4, P 215-223

52- S Zargan, P Ghafarian, A Shabestani Monfared, AA Sharafi, M Bakhshayeshkaram, MR Ay "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 & engineering,2017, Vol 7, P 1

53- Shabnam Khorasani Gerdekoohi, Naser Vosoughi, Kaveh Tanha, Majid Assadi, Pardis Ghafarian, Arman Rahmim, Mohammad Reza Ay "Implementation of absolute quantification in small-animal SPECT imaging: Phantom and animal studies", MEDICAL IMAGING,2017, P 1-9

54- Roya Sharifpour, Pardis Ghafarian, Mehrdad Bakhshayesh-Karam, Hamidreza Jamaati, Mohammad Reza Ay "Impact of time-of-flight and point-spread-function for respiratory artifact reduction in PET/CT imaging: focus on standardized uptake value", Tanaffos, 2017, Vol 16, P 127

55- Isaac Shiri, Arman Rahmim, Pardis Ghaffarian, Parham Geramifar,Hamid Abdollahi "The impact of image reconstruction settings on 18F-FDG PET radiomic features: multi-scanner phantom and patient studies", European Radiology,2017,

56- M Shirin Shandiz, H Saligheh Rad, P Ghafarian, M Bakhshayesh Karam, Afshin Akbarzadeh, Mohammad Reza Ay "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, Vol 13, P 29-39

57- Fatemeh Sadat Fatemi Nasrollahi, Pardis Ghafarian, Parham Grramifar, Mohammad Reza Ay "Quantification and Reduction of Respiratory Induced Artifact in Attenuation Correction of PET Data Using Respiration Averaged CT: a Simulation and Phantom Study", Frontiers in Biomedical Technologies,2016,Vol 3, P 49-59

58- S Kaviani, N Zeraatkar, S Sajedi, N Gorjizadeh, MH Farahani, P Ghafarian, G El Fakhri, H Sabet, MR Ay "Development and characterization of a compact hand-held gamma probe system, SURGEOGUIDE, based on NEMA NU3-2004 standards", Journal of Instrumentation,2016,Vol 11,P T12004

59- P Ghafarian, A Ketabi, A Doroudinia, M Bakhshayesh Karam, MR Ay "Effect of TOF and PSF in detection of lymph node metastases in head and neck of PET/CT images", European Journal of Nuclear Medicine and Molecular Imaging,2016, Vol 43,S507-S507

60- Y Salimi, P Ghafarian, M Deevband, M Bakhshayesh Karam, H Jamaati, M Ay " The impact of using tube-current-modulation technique for attenuation correction of PET/CT images on image quality and patient dose", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING

61- P Ghafarian, R Sharif Pour, A Doroudinia, M Bakhshayesh Karam, MR Ay "The influence of TOF and PSF techniques along with scan duration on respiratory artefact reduction in PET/CT images", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2016

62- M. Shandiz, H. Saligeh Rad, P. Ghafarian, M. Bakhshaysh Karam and M.R. Ay "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", Ann Nucl Med. 2016 Sep 28

63- S. Kaviani, N. Zeraatkar, S. Sajedi, A. Akbarzadeh, N. Gorjizadeh, M. H. Farahani, B. Teimourian, P. Ghafarian, H. Sabet and M.R. Ay "Design and development of a dedicated portable gamma camera system for intra-operative imaging", Phys Med. 2016 Jul;32(7):889-97. doi: 10.1016/j.ejmp.2016.06.004. Epub 2016 Jun 23

64- P. Khateri, H. Saligheh Rad, A. H. Jafari, A. Fathi Kazerooni, A. Akbarzadeh, M. Shojae Moghadam, A. Aryan, P. Ghafarian, M. R. Ay "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", Molecular Imaging & Biology, 2015, Vol. 17, No.6, pp 884-892

65- M. Shekari, P. Ghafarian, S. Ahangari, H. Ghadiri, M. Bakhshayeshkaram and M.R. Ay "Optimizing Image Reconstruction Parameters in Time of Flight PET/CT Imaging: a Phantom Study", Frontiers in Biomedical Technologies, 2015, Vol. 2, No. 3, pp 146-154

66- P. Ghafarian, S. M. Khamesi1 and M. R. Golrokh Nodehi "Performance evaluation of the first Hospital Cyclotron installed in masih daneshvari hospital for Production of positron emitter", Iranian journal of physics research (IJPR ), 2015, Vol.15, No. 2, pp 269-277

67- S. Ahangari, P. Ghafarian, M. Shekari, H. Ghadiri, M. Bakhshayeshkaram and M.R. Ay "The Impact of Point Spread Function Modeling on Scan Duration in PET Imaging", Frontiers in Biomedical Technologies, 2015, Vol. 2, No. 3, pp 137-145

68- S. Sajedi , N. Zeraatkar, V. Moji, M. H. Farahani, S. Sarkar, H. Arabi, B. Teymoorian, P. Ghafarian, A. Rahmim and M.R. Ay "Design and Development of a High Resolution Animal SPECT Scanner Dedicated for Rat and Mouse Imaging", Nuclear. Instrumentation Methods in Physics Research A, 2014, Vol. 741, pp 169-176

69- V. Moji, N. Zeraatkar, M.H. Farahani, M.R. Aghamiri, S. Sajedi, B. Teimourian, P. Ghafarian, S. Sarkar and M.R Ay "Performance evaluation of a newly developed high-resolution, dual-head animal SPECT system based on the NEMA NU1-2007 standard", Journal of Applied Clinical Medical Physics, 2014, Vol. 15, No.6, pp 267-278

70- A. Emami, H. Ghadiri and P. Ghafarian "Performance Evaluation of Bone Mineral Densitometry Techniques by a Novel Phantom", Frontiers in Biomedical Technologies, 2014, Vol.1, No.4, pp 271-278

71- P. Ghafarian, M .R. Ay, A. Fard-Esfahani, A. Rahmim and H. Zaidi "Quantification of PET and CT Misalignment Errors Due to Bulk Motion in Cardiac PET/CT Imaging: Phantom and Clinical Studies", Frontiers in Biomedical Technologies, 2014, Vol.1, No.3,pp 159-167

72- N. Zeraatkar, S. Sajedi, M.H. Farahani, H. Arabi, S. Sarkar, P. Ghafarian, A. Rahmim and M.R. Ay "Resolution-recovery-embedded image reconstruction for a high-resolution animal SPECT system", Physica Medica, 2014, Vol. 30, No.7, pp 774-781

73- P. Ghafarian and M .R. Ay "The Influence of PET and CT Misalignment due to Respiratory Motion on the Cardiac PET/CT Imaging: a Simulation Study", Frontiers in Biomedical Technologies, 2014, Vol.1, No.4, pp 252-257

74- M. R. Ay, A. Mehranian, A. Maleki, H. Ghadiri, P. Ghafarian and H. Zaidi "Experimental assessment of the influence of beam hardening filters on image quality and patient dose in volumetric 64-slice x-ray CT scanners", Phys Med , 2013, Vol. 29, pp. 249-260

75- P. Geramifar, M. Shamsaie Zafarghandi, P. Ghafarian, A. Rahmim and M. R. Ay "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", Molecular Imaging & Biology, 2013, Vol. 15, No. 6, pp 655-665

76- B. Teimourian , M. R. Ay, M. Shamsaei-Zafarghandi, P. Ghafarian, H. Ghadiri and H. Zaidi "A novel energy mapping approach for CT-based attenuation correction in PET", Med Phys 2012, Vol. 39, No. 4, pp 2078-2089

77- N. Zeraatkar, M. R. Ay, P. Ghafarian, S. Sarkar, P. Geramifar, and A. Rahmim "Monte Carlo-based evaluation of inter-crystal scatter and penetration in the PET subsystem of three GE Discovery PET/CT scanners", Nuclear. Instrumentation Methods in Physics Research A, 2011, Vol. 659, pp. 508-514

78- M.R. Ay, A. Mehranian, M. Abdoli, P. Ghafarian and H. Zaidi "Qualitative and quantitative assessment of metal artefacts arising from implantable cardiac pacing devices in oncological PET/CT studies: A phantom study", Molecular Imaging & Biology, 2011, Vol. 13, pp. 1077-1088

79- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, B. Fallahi, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi "Coronary calcium score scan-based attenuation correction in cardiovascular PET imaging", Nuclear Medicine Communication, 2010, Vol. 31, No 9, pp 780-787

80- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi "Is Metal Artifact Reduction Mandatory in Cardiac PET/CT Imaging in the Presence of Pacemaker and Implantable Cardioverter Defibrillator leads?", European Journal of Nuclear Medicine and Molecular Imaging, 2010, Vol. 38, pp 252–262

81- P. Ghafarian, A.A. Sharafi, K. Keshavarz "MCNP4C-based Monte Carlo study of grid performance in diagnostic radiology", Iranian Journal of Medical Physics, 2008, Vol 3, Issue 13, 41-48

82- M.R. Ay, S. Sarkar, M. Shahriari and P. Ghafarian "Measurement of Organ Dose in Abdomen-Pelvis CT Exam as a Function of mA, KVp and Scanner Type by Monte Carlo Method", Iranian J. of Radiation Research, 1(4), 187-194, 2004

Conference Papers

1- Mahsa Amirrashedi, Saeed Sarkar, Hossein Ghadiri, Pardis Ghafarian, Habib Zaidi, Mohammad Reza Ay "A Deep Neural Network To Recover Missing Data In Small Animal Pet Imaging: Comparison Between Sinogram-And Image-Domain Implementations", 2021 IEEE 18th International Symposium on Biomedical Imaging (ISBI)

2- Mahsa Amirrashedi, Saeed Sarkar, Hossein Ghadiri, Pardis Ghafarian, Mohammad Reza Ay "Standard-dose PET reconstruction from low-dose preclinical images using an adopted all convolutional U-Net", Medical Imaging 2021: Biomedical Applications in Molecular, Structural, and Functional Imaging

3- I Shiri, P Ghafarian, P Geramifar, K Leung, M Oveisi, A Rahmim, M Ay "Deep Direct Attenuation Correction of Brain PET images using Emission Data and Deep Convolutional Encoder-Decoder for application to PET/MR and dedicated brain PET scanners", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2019

4- Mahsa Amirrashedi, Saeed Sarkar, Reza Hashemi Shahraki, Parham Geramifar, Habib Zaidi, Mohammad Reza Ay "Performance Evaluation of a Newly Designed SiPM-based Preclinical Scanner Based on NEMA-NU4 2008", EANM'19,2019

5- Sahar Rezaei, Abhinav K Jha, Arman Rahmim, Saeed Sarkar, Mohammad Reza Ay "Joint compensation for motion and partial volume effects in PET/CT images of lung cancer patients: impact on quantification for different image reconstruction methods", EANM'19, 2019

6- Azadeh Emami, Hossein Ghadiri, Parham Geramifar, Mohammad Reza Ay "Recovery of Missing Data in Partial Geometry Dedicated Breast PET Scanner Using Compressive Sensing", EANM'19, 2019

7- Hamidreza Khodajou-Chokami, Seyed Abolfazl Hosseini, Mohammad Reza Ay, Ali Safarzadehamiri, Pardis Ghafarian, Habib Zaidi "A novel method for measuring the mtf of ct scanners: A phantom study", 2019 IEEE International Symposium on Medical Measurements and Applications (MeMeA)

8- Azadeh Emami, Hossein Ghadiri, Parham Geramifar, Mohammad Reza Ay "Monte Carlo simulation of MAMMI PET system and performance evaluation using GATE toolkit", EANM'18,2018

9- Roya Sharifpour, Pardis Ghafarian, Arman Rahmim, Mohammad R Ay " Quantification and reduction of respiratory induced artifacts in positron emission tomography/computed tomography using the time-of-flight technique", Nuclear medicine communications,2017, Vol 38,P 948-955

10- R Sharifpour, P Ghafarian, MR Ay "Evaluation of the Impact of Using TOF Technique on Metal Artifact Reduction in PET/CT Images", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2017,Vol 44, S363-S364

11- A Emami, H Ghadiri, P Ghafarian, M Ay "Monte Carlo Based Performance estimation of breast PET due to reduction of the ring diameter", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2017,Vol 44,S430-S430

12- P Ghaffarian, F Fatemi, P Geramifar, M Ay "Quantification and Reduction of respiratory induced errors in attenuation correction of PET data using respiration averaged CT: a simulation study", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING,2017,Vol 44,S473-S474

13- P Ghafarian, A Ketabi, MA Mosleh-Shirazi, MR Ay "Volume-based assessment of different image reconstruction algorithms and thresholds for FDG-PET/CT based on dose-painting concept", EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2017,Vol 44,S758-S758

14- Zahra Sadat Mojabi, Hossein Ghadiri, Mehrdad Bakhshayeshkaram, Mohammad Reza Ay "Development of low dose CT protocols with acceptable CT image quality for CTAC of PET data: Phantom Study", EANM'17,2017

15- Ali Ketabi, Sadegh Masjoodi, Mohammad Mosleh-Shirazi, Mohammad Ay "Is the averaged SUV from several hottest voxels an alternative to SUVpeak for quantification of large heterogeneous or small lesions in oncological PET imaging?", EANM'17,2017

16- Isaac Shiri, Saeed Ashrafinia, Ahmad Bitarafan-Rajabi, Mohammad Reza Ay, Arman Rahmim "Optimal quantitative SUV metrics over wide range of lesion sizes in advanced image reconstruction (TOF and PSF) for PET", EANM'17,2017

17- Isaac Shiri, Saeed Ashrafinia, Ahmad Bitarafan-Rajabi, Mohammad Reza Ay, Arman Rahmim "Optimal quantitative SUV metrics over wide range of lesion sizes in advanced image reconstruction (TOF and PSF) for PET", EANM'17,2017

18- Isaac Shiri, Arman Rahmim, Ghasem Hajianfar, Hamid Abdollahi, Parham Geramifar, Ahmad Bitarafan-Rajabi "Partial volume correction changes intra-tumoral heterogeneity in 18F-FDG PET", EANM'17,2017

19- Isaac Shiri, Ahmad Bitarafan-Rajabi, Mohammad Reza Ay "Sub-centimeter lesion detectability in Point-spread function (PSF) and Time of flight (TOF) reconstructed PET images", EANM'17,2017

20- Peyman Sheikhzadeh, Hossein Ghadiri, Parham Geramifar, Pardis Ghaffarian, Mohammadreza Ay "Design optimization of partial cylindrical PET scanner based on trapezoid-shaped block detector and monolithic crystals using Monte Carlo simulation", EANM'17,2017

21- P. Sheikhzadeh, H. Sabet, H. Ghadiri, P. Ghafarian, M.R. Ay "Design and Performance evaluation of a Novel Brain PET Geometry Based on Partial Cylindrical Detector using Monte Carlo simulation", European Association of Nuclear Medicine Annual Congress, 15-19 October 2016, Barcelona, spain, Eur J Nucl Med Mol, Vol 43, S 94

22- Shiri, P. Ghafarian, A. Bitarafan, M. BakhshaieshKaram, M.R. Ay "Impact of advanced image reconstruction algorithm on qualitative and quantitative oncological 18F-FDG PET/CT", European Association of Nuclear Medicine Annual Congress, 15-19 October 2016, Barcelona, Spain, Eur J Nucl Med Mol, Vol 43, S509

23- Z. Mojabi, P. Ghafarian, H. Ghadiri, M. Bakhshayeshkaram, H.Jamaati, M.R. Ay "Optimization and evaluation of low dose CT protocol for attenuation correction of PET data", European Association of Nuclear Medicine Annual Congress, 15-19 October 2016, Barcelona, Spain, Eur J Nucl Med Mol, Vol 43, S486

24- P. Sheikhzadeh, H. Sabet, H. Ghadiri, P. Geramifar, H. Mahani,P. Ghafarian, M.R. Ay "Performance characteristics of NeuroPET system using GATE Monte Carlo simulation", European Association of Nuclear Medicine Annual Congress,15-19 October 2016, Barcelona, Spain, Eur J Nucl Med Mol, Vol 43, S512

25- I. Shiri, A. Rahmim, H. Abdollahi1, P. Ghafarian, A. Bitarafan, M.R. Ay, M. BakhshaieshKaram "Radiomics texture features variability and Reproducibility in advance image reconstruction setting of oncological PET/CT", European Association of Nuclear Medicine Annual Congress, 15-19 October 2016, Barcelona, Spain, Eur J Nucl Med Mol, Vol 43, S150

26- Y. Salimi, P. Ghafarian, M. Deevband, M. Bakhshayesh Karam, H.Jamaati, M.R. Ay "The impact of using tube-current-modulation technique for attenuation correction of PET/CT images on image quality and patient dose", European Association of Nuclear Medicine Annual Congress,15-19 October 2016, Barcelona, Spain, Eur J Nucl Med Mol, Vol 43, S525

27- Emami, H. Ghadiri, P. Ghafarian, P. Geramifar, M.R. Ay "Breast-dedicated PET scanner based on partial geometry", European Association of Nuclear Medicine Annual Congress, 15-19 october 2016, Barcelona, spain, Eur J Nucl Med Mol, Vol 43, S93

28- S. Zargan, P. Ghafarian, A. Shabestani Monfared, A. A. Sharafi, M. Bakhshayeshkaram and M. R. Ay "Evaluation of staff and environment exposure from 18-F-FDG at the first PET/T and cyclotron center in Iran", 14th Iranian Congress of Radiographic Science Association, Tehran, Iran, 2016, p 69-70

29- R. Sharif Pour, P. Ghafarian, A. Doroudinia, M. Bakhshayesh Karam and M. R. Ay "Reduction of Respiratory Induced Artefact in PET/CT Images using TOF Reconstruction", American College of Nuclear Medicine annual meeting- SNMMI mid-winter meeting, Jan 2016, Orlando, Florida

30- P. Ghafarian, S. M. Khamesi1, M. R. Golrokh Nodehi and M. R. Ay "Acceptance Test of the first Hospital Cyclotron for Production of PET tracers in Iran", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 518

31- Z. Etemadi, A. Bitaran Rajabi, H. Malek, P. Ghafarian, N. Zeraatkar and M. R. Ay "Can Pacemaker and ICD degrade CT-Based Attenuation Corrected cardiac SPECT images?", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 132

32- M. R. Ay, Z. Etemadi, A. Bitarafan-Rajabi, H. Malek, N. Zeraatkar and P. Ghafarian "Correction of Metal Artefacts Induced from Pacemaker and ICD Leads in CT-Based Attenuation Correction of Cardiac SPECT data", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 522

33- H. Saligheh Rad, M. Shirin Shandiz, P. Ghafarian, M. H. Arabi, M. Bakhshayeshkaram, N. Shafiei and M. R. Ay "Generating a four-class attenuation map for MR-based attenuation correction of PET data in pelvis region using an automatic segmentation protocol", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 201

34- P. Khateri, H. Saligheh Rad, A. Homayoun Jafari, A. Fathi, A. Akbarzadeh, M. Shojae Moghadam, A. Aryan, P. Ghafarian and M. R. Ay "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", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 371

35- S. Ahangari1, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay "Impact of Point spread function modeling on tumor quantification in clinical PET/CT imaging", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 133

36- P. Ghafarian, S. M. Khamesi, M. R. Golrokh Nodehi and M. R. Ay "Measurement of Photon and Neutron Dose Distribution in Cyclotron Bunker During F18 and N13 Production", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 606

37- M. Shekari, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay "The Impact of time of flight algorithm and PSF modeling on standard uptake value in clinical PET/CT imaging", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p 132

38- P. Ghafarian, S. Zargan, A. Shabestani Monfared, A. A. Sharafi, M. Bakhshayeshkaram and M. R. Ay "TLD Measurement of Absorbed Dose of Workers in PET/CT Department", World Congress on Medical Physics & Biomedical Engineering, 7-12 June 2015, Toronto, Canada, p109

39- M. Shirin Shandiz, M.H. Arabi, P. Ghafarian, M. Bakhshayesh Karam, H.R. Salighe Rad and M.R. Ay "A hybrid method for generation of attenuation map for MR-based attenuation correction of PET data in prostate PET/MR imaging", 3rd Conference on PET/MR and SPECT/MR, 19-21 May 2014, Kos Island, Greece

40- M. Shirin Shandiz, M.H. Arabi, P. Ghafarian, M. Bakhshayesh Karam, H.R. Salighe Rad and M.R. Ay "A hybrid method for generation of attenuation map for MR-based attenuation correction of PET data in prostate PET/MR imaging", EJNMMI Physics 2014, 1(Suppl 1): A77

41- M. Shirin Shandiz, M. H. Arabi, P. Ghafarian, M. Bakhshayeshkaram, H. R. Saligherad and M. R. Ay "A Hybrid Method for Separation of Bone and Air in Pelvic Region of MRI images for Attenuation Correction of PET/MR images", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 283

42- P. Ghafarian "A Report on Acceptance Test of GE PET Trace 700 Self-Shield Cyclotron Installed in Masih Daneshvari Hospital", 18th Iranian Congress of Nuclear Medicine, Tehran, Iran, 2014, p 65

43- M. Shirin Shandiz, M. H. Arabi, P. Ghafarian, M. Bakhshayeshkaram, H. R. Saligherad and M. R. Ay "Evaluation of Acquisition Parameters with Short Echo for Improvement of Bone Signal versus Air Signal for Better Separation of Bone and Air in Attenuation Correction of Clinical PET/MR images", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 284

44- S. Ahangari, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay "Evaluation of Resolution Recovery in Quantitative of Clinical PET/CT Images", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 274

45- S. Zargan, A. Shabestari Monfared, P. Ghafarian, A. A. Sharafi, M. Bakhshayeshkaram and M. R. Ay "Experimental Measurement of Absorbed Dose using TLD for Radiation Workers in PET/CT Department", 18th Iranian Congress of Nuclear Medicine, Tehran, Iran, 2014, p 157

46- S. Zargan, A. Shabestari Monfared, P. Ghafarian, A. A. Sharafi, , M. Bakhshayeshkaram and M. R. Ay "Measurement of Staff Dose and Environment Dose by TLD Dosimeter in PET/CT and Cyclotron Centre of Masih Daneshvari Hospital", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 399

47- S. Ahangari, P. Ghafarian, M. Shekari, M. Bakhshayeshkaram and M. R. Ay "Optimazation the Acquisition Time in Whole-Body PET/CT Imaging", 18th Iranian Congress of Nuclear Medicine, Tehran, Iran, 2014, p 75

48- S. Ahangari, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay "Optimization of Acquisition Time Regarding to Image Quality and Quantitative Analysis", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 319

49- P. Ghafarian and S. M. Khamesi "The Calculation of Photon and Neutron Dose Rate inside The Cyclotron Bunker During The Bombardment of F18 and N13 Targets in GE PET Trace 700 Self-Shield Cyclotron", 18th Iranian Congress of Nuclear Medicine, Tehran, Iran, 2014, p 81

50- H. Soufi, P. Ghafarian and S. M. R. Aghamiri "The Effect of Respiratory Motion on different Lung Tumours Size and Uptake Value in PET/CT images", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 343

51- M. Shekari, P. Ghafarian, M. Bakhshayeshkaram and M. R. Ay "The Effect of TOF Technique on Acquisition Time in PET/CT Imaging", 11th Conference of Iranian Medical Physics, Tehran, Iran, 2014, p 286

52- P. Ghafarian ,M. Kohanpour, S.M. Khamesi and M.R. Golrokh Nodehi "Performance Evaluation of the First Hospital Cyclotron Installed in Masih Daneshvari Hospital for Production of Positron Emitter Radioisotopes", 1st National Conference on Particle Accelerators & Their Application,27-28 November 2013-Tehran-Amir Kabir University, p.7

53- P. Ghafarian , M.R. Golrokh Nodehi and S.M. Khamesi "The Calculation of Neutron and Photon Dose Rate as a Function of Distance and Target Current during Flourin-18 Production in PET Trace 700 Self Shield Cyclotron Installed in Masih Daneshvari Hospital", 1st National Conference on Particle Accelerators & Their Application,27-28 November 2013-Tehran-Amir Kabir University, p.53

54- P. Ghafarian and M. R. Ay "The Influence of Misalignment Artifact Due to Global and Respiratory Motion on Interpretation of Cardiac PET/CT Examination: Clinical and Phantom Studies"", European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, , Vol 20, Issue 2

55- H. Soufi, P. Ghafarian and S.M.R Aghamiri "The Influence of Respiratory Motion Induced Artifacts on SUV Calculation in Lung PET/CT Imaging", European Association of Nuclear Medicine Annual Congress, 19-23 October 2013, Lyon, France. Eur J Nucl Med Mol, , Vol 20, Issue 2

56- N. Zeraatkar, M. H. Farahani, H. Arabi, S. Sarkar, S. Sajedi, N. Naderi, P. Ghafarian, A. Rahmim and M.R. Ay "An Innovative Rotation-Based Iterative Resolution Recovery for HiReSPECT™: a Dedicated Small Animal SPECT System", European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Italy. Eur J Nucl Med Mol, S386-S387

57- M. R. Ay, H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajedi, N. Naderi Rastegar and P. Ghafarian "Design and development of a high resolution small animal imaging system for mice and rat", European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S441

58- M. Sedighpoor, P. Ghafarian, A. Emami, M. R. Ay "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", European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S515

59- M. R. Ay, A. Mehranian, P. Ghafarian ,M. Abdoli and H.Zaidi "Quantification and Correction of Metallic Artifacts Arising from Implantable Cardiac Pacing Devices in PET/CT Studies: A Phantom Study", European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S20

60- M. R. Ay, H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajedi, N. Naderi Rastegar and P. Ghafarian "SurgeoSight TM: An intraoperative hand held Gamma camera for precise localization of sentine lymph nodes", European Association of Nuclear Medicine Annual Congress, 27-31 October 2012, Milan, Itly. Eur J Nucl Med Mol, S385

61- H. Arabi, M. H. Farahani, N. Zeraatkar, S. Sarkar, S. Sajedi, A. Rahmim, P. Ghafarian and M. R. Ay "High resolution small animal SPECT: HiReSPECT for preclinical imaging", Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 93, 2012

62- Emami, H. Ghadiri, P. Ghafarian and M. R. Ay "QCT technique optimization by dual energy CT", Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 125, 2012

63- M. Sedigpoor, M. R. Ay, P. Ghafarian, P. Farnia "Quantification of the influence of respiratory motion induced misalignment between PET and CT data on diagnosis of heart disease in cardiac PET/CT imaging", Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 129, 2012

64- P. Ghafarian "The influence of metallic artefact reduction on the accuracy of attenuation map generation in cardiac PET/CT imaging", Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 121, 2012

65- P. Ghafarian "The influence of PET and CT data misalignment in cardiac PET/CT examination: an analytic simulation", Proc. Asia Oceania Congress of Nucl. Med. & Biology, vol. 20 (suppl. 1), p. 120-121, 2012

66- Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, A. Eslami, P. Ghafarian and S. Taghizadeh "A New Phantom for Performance Evaluation of Bone Mineral Densitometry Using DEXA and QCT", IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 3441-3445

67- Najafi Darmian A, M.R. Ay, Ghafarian P, Pouladian M, Shirazi A, Ghadiri H, Akbarzadeh A and Zaidi H "Characterization of scattered radiation profile in volumetric 64-slice x-ray CT scanner: A Monte Carlo study", IEEE Nuclear Science Symposium & Medical Imaging Conference, Valencia, Spain, 23-29 October 2011, p. 2692–2696

68- Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, A. Eslami, P. Ghafarian and S. Taghizadeh "A Novel Phantom for Accurate Performance Assessment of Bone Mineral Measurement Techniques: DEXA and QCT", 5th Kuala Lumpur International Conference on Biomedical Engineering, 20-23 June 2011, Kuala Lumpur, Malaysia, IFMBE Proceedings 35, p. 47-50

69- P. Ghafarian, M.R. Ay and J. Hassani "Correction of contrast agent induced srtifacts in CT-based attenuation correction of cardiac PET data using a semi-automated segmentation algorithm", 3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 110

70- Emami, H. Ghadiri, M.R. Ay, S. Akhlagpour, P. Ghafarian and S. Taghizadeh "Is percentage error of bone density determined by DEXA technique influenced by density?", 3th International Congress of Nuclear Medicine, Tehran, Iran, 2011, pp 88

71- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Fard Esfahani and H. Zaidi "Assessment of the Influence of PET and CT Data Misalignment Errors in Cardiac PET/CT Examination: Patient and Phantom Studies", The International Congress of Nuclear Medicine, Mashhad, Iran, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 81

72- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, B. Fallahi, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi "Coronary Calcium Score Scan-Based Attenuation Correction in Viability PET Examination: A Feasibility Study", 2010, The 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

73- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, B. Fallahi, A. Rahmim, T. Schindler, O. Ratib and H. Zaidi "Impact of Metal Artifact Reduction on Cardiac FDG-PET/CT Studies in the Presence of Pacemaker and Implantable Cardio Verter Defibrillator leads", International Congress of Nuclear Medicine, Mashhad, 2010, Iranian Journal of Nuclear Medicine, Vol. 18, Supp. 1, 2010, pp. 104

74- M.R. Ay, A. Mehranian, P. Ghafarian, M. Abdoli and H. Zaidi "Quantification and Correction of Metallic Artifact Arising from Implantable cardiac Pacing Devices in PET/CT Studies: A Phantom Study", 2010, The 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

75- P. Ghafarian, S.M.R. Aghamiri, M.R. Ay, A. Rahmim and H. Zaidi "CT Based Attenuation Correction in Cardiac PET/CT Using Calcium Score CT Image: A Feasibility Study", International Congress of Nuclear Medicine and Molecular Imaging, Tabriz, Iran, 23-25 September, 2009, pp. 9

76- P. Ghafarian and S.M.R. Aghamiri, M.R. Ay, A. Rahmim and H. Zaidi "Quantification of PET and CT Data Misalignment Errors in Cardiac PET/CT: Clinical and Phantom Studies", The 3rd International Conference on Bioinformatics and Biomedical Engineering (IEEE iCBBE 2009), June 11th to 13th, 2009, 1-4, Beijing, China

77- M.R. Ay, A. Maleki, H. Ghadiri, P. Ghafarian, A. Ahmadian and H. Zaidi "The Influence of X-ray Spectra Filtration on Image Quality and Patient Dose in the GE VCT 64-Slice Cardiac CT Scanner", The 3rd International Conference on Bioinformatics and Biomedical Engineering (IEEE iCBBE 2009), June 11th to 13th, 2009, 1-4, Beijing, China

78- M.R. Ay, J.H. Bidgoli, P. Ghafarian and H. Zaidi "Reduction of Intravenous Contrast Related Artifacts in CT-based Attenuation Corrected PET Images", 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

79- M.R. Ay, P. Ghafarian and H. Zaidi "A hybrid approach for fast simulation of x-ray computed tomography", Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007 Vol 5; pp. 3155-3160

80- P. Ghafarian, M.R. Ay, H. Ghadiri, S. Sarkar and H. Zaidi "Impact of x-ray tube voltage, field size and phantom thickness on scattered radiation in diagnostic radiology: A Monte Carlo investigation", Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007 , Vol 5; pp. 3542-3547

81- M.R. Ay, H. Ghadiri, P. Ghafarian, S. Sarkar and H. Zaidi "The influence of energy indexing algorithm and electron substeps on MCNP4C electron transport: Application to simulation of x-ray spectra in diagnostic radiology and mammography", Proceedings of IEEE Nuclear Science Symposium & Medical Imaging Conference, Honolulu, Hawaii, 28 October – 3 November 2007, Vol 5; pp. 4006-4011

82- P. Ghafarian , Sharafi AA, Keshvarz K and Zaidi H "MCNP4C-based Monte Carlo study of grid performance in diagnostic radiology", Proceedings of the 14th International Conference of Medical Physics, Nuremberg, Germany, September 14-17, 2005, Biomedizinische Technik Vol. 50, Suppl, part 1, pp 1098-1099

83- M.R. Ay, S. Sarkar, M. Shahriari, and P. Ghafarian "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", In 2th International Conference on Nuclear Science and Technology in Iran. Shiraz, Iran, 27-30 April 2004, p. 46

84- M.R. Ay, M. Shahriari, S. Sarkar, and P. Ghafarian "Measurement of organ dose in abdomen-pelvis CT exams as a function of mA, KVp and scanner type by Monte Carlo method", 3th 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

Thesis Directed

1- ''Development of Molecular PET/CT imaging-based IMRT Treatment Planning and quantification of the impact of image reconstruction algorithms on local tumor control'',  2015, Advisor, PhD Thesis

2- ''Design, modeling and performance evaluation of dedicated brain positron emission tomography with high resolution and sensitivity using Monte Carlo simulation'',  2015, Advisor, PhD Thesis

3- ''Estimation of neutron and gamma contamination in cyclotron center using Monte Carlo simulation and digital phantom'',  2015, Advisor, PhD Thesis

4- ''A Novel hybrid method (protocol design & image segmentation) for generation of attenuation map at 511 keV from MR images in pelvis region for MR-based Attenuation correction in PET/MRI systems'',  2014, Advisor, PhD Thesis

5- ''The influence of PET/CT images on accuracy of treatment planning'',  2014, Supervisor, MSc Thesis

6- ''Measurement of staff dose and environment dose by TLD Dosimeter in PET/CT and Cyclotron Centre of Masih Daneshvari Hospital'',  2014, Supervisor, MSc Thesis

7- ''Quantification and Correction of Metal Artifacts in CT-based Attenuation correction of PET images'',  2013, Advisor, MSc Thesis

8- ''Design and optimization of oncologic imaging protocol in Discovery 690 PET/CT scanner based on clinical and phantom study'',  2013, Supervisor, MSc Thesis

9- ''Evaluation of the benefits of time of flight technique in PET imaging using quantitative and qualitative analysis of clinical and phantom images'',  2013, Supervisor, MSc Thesis

10- ''Design and Implementation of Performance Evaluation Protocol for PET/CT scanner based on International Standards'',  2013, Supervisor, MSc Thesis

11- ''Quantification of CT and PET Images Mismatch Effect due to Respiratory Motion for Lung Tumors Uptake Value in PET/CT Imaging'',  2013, Supervisor, MSc Thesis

12- ''Quantification and Correction of Metal Artifacts Arising from Pacemaker and ICD Leads in CT-based Attenuation Correction of Cardiac SPECT Imaging'',  2012, Advisor, MSc Thesis

13- ''Quantification of the influence of accuracy of heart disease in cardiac PET/CT imaging'',  2010, Advisor, MSc Thesis

14- ''Quantification and Reduction of respiratory induced errors in attenuation correction of PET data using respiration averaged CT'',  2017,MSc Thesis

15- ''Implementation and evaluation of attenuation correction protocol for PET data using ultra low dose CT to reduce'',  2017, MSc Thesis

16- ''Evaluation of the Impact of Using Time of Flight Data on Reduction of CTAC Induced Artifacts in PET/CT Imaging'',  2017, MSc Thesis

17- ''Quantitative evaluation of the effect of random coincidence rates on the quality of PET images in whole-body imaging'',  2019, MSc Thesis

18- ''Quantitative analysis of Radiomics feature in PET-CT for improving diagnosis of malignant lesions in lung cancer'',  2020, MSc Thesis

19- ''Quantification and calibration of measurement errors in standardized uptake value (SUV) in PET/CT systems using phantom: A multicenter study'',  2020, MSc Thesisi

20- ''Design and development of variable time bed position protocol in whole body PET/CT imaging '',  2020, MSc Thesis

21- ''optimization of different image quality parameters of Rectom PET/CT scan with using BPL reconstruction algorithm'',  2021, MSc Thesis

Professional Experience

2006 - Present, Researcher
Geneva University Hospital, PET Instrumentation and Neuroscience Lab (http://pinlab.hcuge.ch/staff.html)

2006 - Present, Assistant Researcher
Research Center for Science and Technology in Medicine, Medical Imaging Systems Lab.

Research

. Attenuation correction in PET/CT

. Attenuation correction in PET/MR

. Attenuation correction in SPECT/CT

. Tracer production

. Artifact reduction in hybrid imaging

. Quantitative analysis in nuclear medicine

. Quantitative analysis in PET/CT

. Image reconstruction of imaging systems

. Analytical modeling of imaging systems

. Monte Carlo simulation

. Quality control of hybrid imaging systems

. Shielding design

. Dosimetry

Computer Skills

. Programming with MATLAB

. Programming with C++

. GATE

. STIR

. XCAT

. Programming with Basic

. Linux

. MCNP

. Monte Carlo Packages in NM/PET