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Aneurysm clips made of titanium: magnetic characteristics and artifacts in MR
W Wichmann1, K Von Ammon, U Fink
1Institute 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.