1. From the Mallinckrodt Institute of Radiology (M.Z., A.S., M.I., M.N., C.L.S.) and Department of Obstetrics and Gynecology (V.S.R.), Washington University School of Medicine, 510 S Kingshighway Blvd, St Louis, MO 63110; Department of Radiology, Mayo Clinic Arizona, Scottsdale, Ariz (M.Y.); Department of Diagnostic Imaging and Interventional Radiology, Moffitt Cancer Center, Tampa, Fla (M.M.); and Department of Oncologic Sciences, University of South Florida College of Medicine, Tampa, Fla (M.M.).