1. From the Martinos Center for Biomedical Imaging, Department of Radiology (D.E.S., R.W., G.D., V.J.W.), Massachusetts General Hospital, Harvard Medical School, Boston, Mass; the Cardiology Division (D.E.S.), Massachusetts General Hospital, Harvard Medical School, Boston, Mass; Harvard-MIT Division of Health Sciences and Technology (D.E.S.), Cambridge, Mass; the Departments of Mechanical and Biological Engineering (T.W., R.J.G.), Massachusetts Institute of Technology, Cambridge, Mass; Leducq...