Summary
International Symposium on Electromagnetic Compatibility
2014
Session Number:14P2-H
Session:
Number:14P2-H6
Safety Assessment of AIMD under MRI Exposure: Tier-3 vs. Tier-4 Evaluation of Local RF-induced Heating
Eugenia Cabot, Earl Zastrow, Niels Kuster,
pp.-
Publication Date:2014/05/12
Online ISSN:2188-5079
DOI:10.34385/proc.18.14P2-H6
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Summary:
Patients with active implantable medical devices(AIMDs) are generally excluded from magnetic resonance (MR)diagnostics because interference of the AIMD with MR-inducedradiofrequency (RF) fields can lead to hazardous localizedheating in the surrounding tissues. In this work, we report thesafety assessment of a generic device performed according to tier3 and 4 guidelines in Technical Specification 10974. For tier 3,local tissue heating was obtained by applying RF fields, obtainednumerically in vivo in human models exposed to MRI coils, to atransfer function of the device. For tier 4, a validated model ofthe generic device was implanted in anatomical human modelsexposed to the RF of MRI coils, and full-wave computationalelectromagnetic simulations were performed. A comparison ofthe two methods is made.