[1] Department of Radiology, School of Paramedical Sciences, Mashhad University of Medical Sciences (MUMS), Member of Student's Research Assembly of MUMS, Mashhad, Iran
[2] Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
[3] Department of Medical Physics, Bu-Ali Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
[4] Department of Biostatistics, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran