title: Wallstent metallic biliary endoprosthesis: MR imaging characteristics.
abstract: Image quality and safety of magnetic resonance (MR) imaging were evaluated in vitro and in eight patients with the most commonly employed metallic biliary endoprosthesis. In vitro, the stent produced no tip deflection at 0.6 or 1.5 T. Trace magnetic susceptibility artifact, similar to artifact from a column of air, paralleled the stent. In patients, image degradation was minimal with conventional pulse sequences. Middle-field-strength spin-echo images revealed minimal artifacts indistinguishable from those produced by pneumobilia.
authors.affiliation: Department of Radiology, Massachusetts General Hospital, Boston.
authors.forename: M J
authors.initials: MJ
authors.lastname: Girard
authors.forename: P F
authors.initials: PF
authors.lastname: Hahn
authors.forename: S
authors.initials: S
authors.lastname: Saini
authors.forename: S L
authors.initials: SL
authors.lastname: Dawson
authors.forename: M A
authors.initials: MA
authors.lastname: Goldberg
authors.forename: P R
authors.initials: PR
authors.lastname: Mueller
mesh_terms: D001659:Biliary Tract / Q000473:pathology*; D002779:Cholestasis / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008670:Metals; D015607:Stents
chemical_list: D008670:Metals