1. From the Department of Radiology (P.E.B., S.L.Z., M.R., I.R.K., R.L.W., D.A.B.), Division of Cardiology (H.-C.L., I.P., A.P., M.R.A., T.P.A.), and Department of Pathology (C.S.), Johns Hopkins Medical Institutions, Baltimore, MD; National Institutes of Health, Bethesda, MD (D.A.B.); Department of Medical Ultrasound, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China (H.-C.L.); and Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany (F.M.B.).