1. From the Department of Radiology, Royal Marsden Hospital NHS Foundation Trust, Sutton, England (J.D.S., D.a.D., K.D., N. P., C.M., D.M.K.); Institute of Cancer Research, 15 Cotswold Road, Sutton SM2 5NG, England (S.J.D., S.K., J.P.B.O., N. P., C.M., D.M.K., M.R.O.); and Computational Clinical Imaging Group, Champalimaud Foundation, Centre for the Unknown, Lisbon, Portugal (N.P.).