1. From the Department of Imaging (F.A., K.W., R.G., A.B.S.) and Lank Center for Genitourinary Oncology (A.H.N., G.S.), Dana Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215; and Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass (F.A., K.W., R.G., S.G.S., A.B.S.).