1. From the Department of Radiology (E.S.), Brigham and Women’s Hospital, Boston, Mass; the Department of Cardiology (E.J.S., A.T., G.H., L.F.), Massachusetts General Hospital, Boston, Mass; ‡ONI Medical Systems, Inc (R.P.M., R.G., R.D.), Wilmington, Mass; the Department of Cardiology (A.d.A., V.Y.R.), University of Miami, Miami, Fla; GE Global Research (R.P.M., R.G., R.D.), Niskayuna, NY; GE Healthcare Applied Science Laboratory (G.S.S., M.M.F.), Bethesda, Md; St Jude Medical (J.D.), Minnetonka, Minn;...