1. From the Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, 1053 Carling Ave, C1 Radiology, Ottawa, ON, Canada K1Y 4E9 (W.T., J.A.G., A.U., N.S.); and Department of Radiology and Medical Imaging, King Saud University Medical City, King Khalid University Hospital, Riyadh, Saudi Arabia (A.A.).