1. From the Division of Nuclear Medicine, Departments of Radiology (M. Hotta, R.M.) and Cardiovascular Medicine (T.A., M. Hiroe, O.O., Y.H.), National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan; and Department of Cardiovascular Medicine, Toho University Medical Center Ohashi Hospital, Tokyo, Japan (T.A.).