1. From the Department of Radiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe-shinmachi, Suita 564-8565, Japan (Y.O., T.N., Y.N., E.T., A.K., H.H., M.F., Y.M., T.F.); and MR Research & Collaboration Department, Siemens Healthcare K.K., Tokyo, Japan (Y.I.).