1. From the Division of Hematology/Oncology, Department of Radiology, and Molecular Imaging Center, Beth Israel Deaconess Medical Center (J.V.F.); the Cardiology Laboratory of Integrative Physiology & Imaging, Cardiovascular Research Center, Massachusetts General Hospital (R.J.H.); and Harvard Medical School (J.V.F., R.J.H.), Boston, Mass.