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Abstract

Metallic otologic implants: in vitro assessment of ferromagnetism at 1.5 T.

F G Shellock and C J Schatz
American Journal of Neuroradiology March 1991, 12 (2) 279-281;
F G Shellock
Department of Diagnostic Radiology, Cedars-Sinai Medical Center, Los Angeles, CA 90048.
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C J Schatz
Department of Diagnostic Radiology, Cedars-Sinai Medical Center, Los Angeles, CA 90048.
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Abstract

MR imaging is contraindicated for patients with certain ferromagnetic implants because of potential risks related to movement or dislodgement. This is especially true for metallic implants located in sensitive areas of the body, such as those placed in and around the ear. Therefore, the ferromagnetic qualities of 35 different metallic otologic implants were assessed by placing them individually on a millimeter scale in a plastic petri dish that was slowly moved into the center of a 1.5-T MR imaging system. None of the metallic otologic implants moved during this procedure. The results demonstrate that each of these implants are made from nonferromagnetic materials and do not pose a risk to patients undergoing high-field-strength MR imaging. These data effectively expand the list of metallic implants that appear to be safe for MR imaging.

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American Journal of Neuroradiology
Vol. 12, Issue 2
1 Mar 1991
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Metallic otologic implants: in vitro assessment of ferromagnetism at 1.5 T.
F G Shellock, C J Schatz
American Journal of Neuroradiology Mar 1991, 12 (2) 279-281;

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Metallic otologic implants: in vitro assessment of ferromagnetism at 1.5 T.
F G Shellock, C J Schatz
American Journal of Neuroradiology Mar 1991, 12 (2) 279-281;
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