1. From the Departments of Radiology (M.A.H., I.B.C., C.T., S.A., A.M.T., S.B.G., S.S., M.Z.) and Digestive Surgery (J.L.), Groupe Hospitalier Paris Saint-Joseph, 185 Rue Raymond Losserand, 74014 Paris, France; and Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Tex (G.K.).