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Radiology, Vol 208, 700-708, Copyright © 1998 by Radiological Society of North America

ARTICLES

Cochlear implants: in vitro investigation of electromagnetic interference at MR imaging--compatibility and safety aspects

C Teissl, C Kremser, ES Hochmair and IJ Hochmair-Desoyer
Department of Applied Physics, Universitat Innsbruck, Austria.

In vitro experiments were performed to determine the compatibility of a cochlear implant at 0.2- and 1.5-T magnetic resonance (MR) imaging. Except for the torque at 1.5 T, all electromagnetic interferences remained within acceptable limits. MR imaging should be performed only if there is a strong medical indication, by following appropriate safety procedures. MR imaging at 0.2 T should be safe; at 1.5 T, however, the relative risks will have to be assessed.


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