1. From the Division of Nuclear Medicine and Molecular Imaging (S.Y.P., C.Z., C.H., N.H., A.I.) and Departments of Urology (R.E.F., G.A.S.), Pathology (C.K.), and Radiology (P.G., B.D., A.M.L.), Stanford University Medical Center, 300 Pasteur Dr, Room H-2200, Stanford, CA 94305; and Department of Nuclear Medicine, University Hospital Heidelberg, Heidelberg, Germany (F.G.).