title: Aneurysm clip testing for ferromagnetic properties: clip variability issues.
abstract: To assess ferromagnetic properties of intracranial aneurysm clips reported to be nonferromagnetic, 1,765 Yasargil, 11 Sugita, and 15 Perneczky aneurysm clips were studied for rotation or translation on plate glass in a 1.5-T MR imager. Sixty-three clips (52 Yasargil, 11 Perneczky) weakly reoriented along the static magnetic resonance (MR) field. These results confirm the need for standardized testing for ferromagnetic properties for implantable metallic devices.
authors.affiliation: Department of Radiology, University of Pittsburgh Medical Center, PA 15213-2582, USA.
authors.forename: E
authors.initials: E
authors.lastname: Kanal
authors.forename: F G
authors.initials: FG
authors.lastname: Shellock
authors.forename: J S
authors.initials: JS
authors.lastname: Lewin
mesh_terms: D000075202:Contraindications; D004867:Equipment Design; D006801:Humans; D002532:Intracranial Aneurysm / Q000601:surgery*; D008026:Ligation / Q000295:instrumentation; D008279:Magnetic Resonance Imaging / Q000009:adverse effects*; D008280:Magnetics; D008422:Materials Testing / Q000592:standards; D008670:Metals; D019736:Prostheses and Implants; D012449:Safety; D013525:Surgical Instruments
chemical_list: D008670:Metals