1. From the Departments of Interventional Radiology (M.P.M., T.A.F., L.T., Y.Q., N.M.M., K.D., A.M., S.G., A.L.T.), Veterinary Medicine and Surgery (M.G., J.M., M.M.), and Imaging Physics (D.T.F., K.L.M.), the University of Texas M.D. Anderson Cancer Center, PO Box 301402, Unit 1471; Houston, TX 77230-1402; and Houston Methodist Cancer Center, Houston Methodist Research Institute, Houston, Tex (J.G., J.E.E.).