American Journal of Neuroradiology, Vol 18, Issue 5 939-944, Copyright © 1997 by American Society of Neuroradiology
ARTICLES |
Aneurysm clips made of titanium: magnetic characteristics and artifacts in MR
W Wichmann, K Von Ammon, U Fink, T Weik and GM Yasargil
Institute of Neuroradiology, University Hospital, Zurich, Switzerland.
PURPOSE: 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. CONCLUSION: The titanium clips improve image quality, biocompatibility, and patient safety in medical MR applications.
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