1. From the Departments of Radiology (F.C., D.a.D., N.C.M., S.J.W., A.M.R., D.M.K., J.D.S.), Oncology (J.M.), Radiotherapy (J.G.), and Nuclear Medicine (B.D.), Royal Marsden Hospital, Downs Road, Sutton SM2 5PT, UK; and Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK (F.C., D.M.K.).