1. Medical Physics Department, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran;
2. Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran;
3. Radiotherapy Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran;
4. Medical Physics Research Center, Bu Ali Research Institute, Mashad University of Medical Sciences, Mashad, Iran;
5. Department of Medical Physics and Radiology, Faculty of Paramedical Sciences, Kashan University of Medical Sciences, Kashan, Iran