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Abstract #2629

Test field diversification method for the safety assessment of RF-induced heating of AIMDs during 1.5-T MRI

Aiping Yao1,2, Earl Zastrow1, and Niels Kuster1,2

1IT'IS Foundation, Zurich, Switzerland, 2Department of Information Technology and Electrical Engineering, ETH-Zurich, Zurich, Switzerland

Elongated AIMD can pick up the RF-energy during MR exposure, and locally deposit the energy in the tissue near its vicinity --- typically near the conductive electrodes. Current experimental assessment strategy is capable to achieve only a limited set of AIMD exposure conditions. In this work, we outline a method by which the exposure conditions may be diversified during experimental testing. The feasibility of the method is evaluated for three generic implants. The RF-induced deposited power of the AIMD over more than 1000 exposure conditions was evaluated and approximately 20 dB dynamic range in the deposited power was achieved.

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