title: Gastrointestinal contrast agents: a diamagnetic approach.
abstract: The clay minerals kaolin and bentonite are demonstrated as gastrointestinal contrast agents for MRI. Weak field dependence of the relaxation efficiency assures effectiveness of these agents at all field strengths in clinical use. These agents eliminate signals from their immediate environment and are not toxic.
authors.affiliation: Department of Radiology, University of Rochester Medical Center, New York 14642.
authors.forename: J J
authors.initials: JJ
authors.lastname: Listinsky
authors.forename: R G
authors.initials: RG
authors.lastname: Bryant
mesh_terms: D001546:Bentonite; D003287:Contrast Media; D004064:Digestive System / Q000033:anatomy & histology*; D006801:Humans; D007616:Kaolin; D008279:Magnetic Resonance Imaging
chemical_list: D003287:Contrast Media; D001546:Bentonite; D007616:Kaolin