1. Department of Radiology Technology , School of Allied Medical Sciences, , Birjand, Ghafari street, 971785307, Birjand , Iran
2. Birjand University of Medical Sciences , School of Allied Medical Sciences, , Birjand, Ghafari street, 971785307, Birjand , Iran
3. Department of Medical Physics , School of Allied Medical Sciences, , Sabzevar, Assad abadi street, 4401100 , Iran
4. Sabzevar University of Medical Sciences , School of Allied Medical Sciences, , Sabzevar, Assad abadi street, 4401100 , Iran