1. Department of Medical Physics, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
2. Department of Radiology Technology, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran
3. Department of Radiology Technology, School of Paramedical Sciences, Guilan University of Medical Sciences, Rasht, Iran
4. Department of Medical Physics, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran