1. From the Section of Abdominal Imaging and Nuclear Radiology Department, Cleveland Clinic, Imaging Institute, 9500 Euclid Ave, JB3, Cleveland, OH 44195 (A.S.P.); Department of Radiology, NYU Langone Medical Center, New York, NY (A.B.R.); Molecular Imaging Program, National Cancer Institute, Bethesda, Md (I.B.T.); and Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, Md (K.J.M.).