Cochlear implants: in vitro investigation of electromagnetic interference at MR imaging--compatibility and safety aspects.
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.
Teissl
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C
Department of Applied Physics, Universität Innsbruck, Austria.
Kremser
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C
Hochmair
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ES
Hochmair-Desoyer
I J
IJ
D003054:Cochlear Implants; D000075202:Contraindications; D004574:Electromagnetic Fields / Q000009:adverse effects*; D004869:Equipment Safety; D006801:Humans; D008279:Magnetic Resonance Imaging; D019047:Phantoms, Imaging; D012306:Risk