1. From the Departments of Imaging (H.P., M.N.) and Medical Oncology (M.M.A.), Dana-Farber Cancer Institute, and Departments of Radiology (H.P., H.H., M.N.), Pathology (L.M.S.), and Medicine (M.M.A.), Brigham and Women’s Hospital, 450 Brookline Ave, Boston, MA 02215.