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(Radiology. 1999;210:563-565.)
© RSNA, 1999

Technical Developments

Aneurysm Clips: Effects of Long-term and Multiple Exposures to a 1.5-T MR System

Emanuel Kanal, MD1 and Frank G. Shellock, PhD2

1 Department of Radiology, University of Pittsburgh Medical Center, Rm D-132, 200 Lothrop St, Pittsburgh, PA 15213 (E.K.)
2 Department of Radiology, University of Southern California School of Medicine, Los Angeles (F.G.S.).

The authors evaluated the ferromagnetic properties of multiple nonferromagnetic aneurysm clips before and after long-term and multiple exposures to a 1.5-T magnetic resonance system. No alterations in the magnetic properties of these clips was observed. These findings suggest that repeated or chronic exposure of patients with implanted nonferromagnetic aneurysm clips to strong static magnetic fields is unlikely to result in any clinically significant alteration in the magnetic properties of these clips.

Index terms: Aneurysm, cerebral, 17.457, 17.73 • Head, MR, 10.1214, 17.457 • Magnetic resonance (MR), safety, 17.457 • Radiology and radiologists, iatrogenic injury




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