1. From the Cardiac MR PET CT Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA (Q.A.T., I.S.R., A.A.M., M.F.K., U.H.); the Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (Q.A.T., C.J.O.); the Department of Mathematics, Boston University, Boston, MA (J.M.M.); the Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA (I.S.R.); West German Heart Center, Cardiology Department, University Clinic Essen,...