Magnetic resonance imaging and aneurysm clips

A review

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The problem of implanted metals causing tissue damage by movement in patients exposed to MRI fields has produced a confusing welter of erroneous, pseudoscientific publications about magnetics, metals, medical equipment, and tissue compatibility. Quite simply, among the devices made for implantation, only those fabricated of stainless steel have the ferromagnetic properties capable of causing such accidents. The author, who introduced the basic design of the modern aneurysm clip in the late 1960s and then a cobalt nickel alloy as an improvement over steel, while chairing the neurosurgical committee assigned to the task of establishing neurosurgical standards at American Society for Testing and Materials, exposes this flawed information and offers clear guidelines for avoiding trouble.

Abbreviations used in this paper:AANS = American Association of Neurological Surgeons; ASTM = American Society of Testing and Materials; CNS = Congress of Neurological Surgeons; MIT = Massachusetts Institute of Technology.
Article Information

Contributor Notes

Address correspondence to: Joseph T. McFadden, M.D., 513 Mowbray Arch, Norfolk, Virginia 23507. email: include this information when citing this paper: published online April 13, 2012; DOI: 10.3171/2012.1.JNS111786.
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