1. College of Applied Medical Sciences, Department of Radiologic Technology, Qassim University, P. O. Box 6800, Buraidah-KSA, 51452, Saudi Arabia
2. College of Medical Radiologic Science, Sudan University of Science and Technology, Khartoum-Sudan, Saudi Arabia
3. College of Applied Medical Sciences, Department of Radiological Science, King Saud University, Riyadh-KSA, Saudi Arabia