title: Aneurysm clips made of titanium: magnetic characteristics and artifacts in MR.
abstract: OBJECTIVE
  To evaluate the magnetic characteristics, artifact formation, and implant safety of titanium aneurysm clips for use in MR imaging.
  
  
  METHODS
  Aneurysm clips made of titanium alloy TiAl6V4 were tested in a magnetometer to determine their magnetic susceptibility and in a 1.5-T MR imager using both a geometric phantom and an animal model. A commercially available alpha-Phynox clip served as the reference standard.
  
  
  RESULTS
  We found minimal magnetization and a significant reduction in image artifacts with the titanium clip as compared with the Phynox clip.
  
  
  CONCLUSIONS
  The titanium clips improve image quality, biocompatibility, and patient safety in medical MR applications.
authors.affiliation: Institute of Neuroradiology, University Hospital, Zurich, Switzerland.
authors.forename: W
authors.initials: W
authors.lastname: Wichmann
authors.forename: K
authors.initials: K
authors.lastname: Von Ammon
authors.forename: U
authors.initials: U
authors.lastname: Fink
authors.forename: T
authors.initials: T
authors.lastname: Weik
authors.forename: G M
authors.initials: GM
authors.lastname: Yasargil
mesh_terms: D000783:Aneurysm / Q000175:diagnosis / Q000601:surgery*; D000818:Animals; D016477:Artifacts; D001672:Biocompatible Materials; D004195:Disease Models, Animal; D004869:Equipment Safety; D018810:Magnetic Resonance Angiography / Q000295:instrumentation*; D009493:Neurosurgery / Q000295:instrumentation / Q000379:methods; D019047:Phantoms, Imaging; D051381:Rats; D013525:Surgical Instruments; D014025:Titanium
chemical_list: D001672:Biocompatible Materials; D014025:Titanium