1. From the Department of Radiology (T.Z., P.C., S.A., E.D.), EA 4662 Nanomedicine Laboratory, Imagery and Therapeutics (P.C., S.A., E.D.), and Department of Gastroenterology (S.K., L.V.), University of Bourgogne Franche-Comté, CHRU Besançon, 3 boulevard Alexandre Fleming, 25030 Besançon, France.