1. From the Department of Radiology (E.L.S., M.C., C.M.M., B.C.A., E.B., G.L.J., C.Y.K., J.R., M.R.B.), Department of Pathology (D.M.C.), Division of Gastroenterology, Department of Medicine (L.Y.K., M.R.B.), and Center for Advanced Magnetic Resonance Development (G.L.J., M.R.B.), Duke University Medical Center, Box 3808, Durham, NC; and Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, NY (R.K.D.).