Meshal Ali Alshahrani1, Faisal Fahad Aloufi2, Faisal Mohammed Alabdulkarim2, Abdulrahman Hesham Nadrah2. 1. Department of Radiology, King Faisal Specialist Hospital and Research Centre, MBC-28, P.o.Box 3354, Riyadh, 11211, Saudi Arabia. Meshal-89@live.com. 2. Department of Radiology, King Faisal Specialist Hospital and Research Centre, MBC-28, P.o.Box 3354, Riyadh, 11211, Saudi Arabia.