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Abstract #2628

Test medium derivation for the safety assessment of RF-induced heating of leaded cardio implants 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

It is a common practice that an equivalent mathematical model of an implant is used to estimate in vivo power deposition caused by RF-implant interactions. The model is often derived under in vitro conditions. We assess the suitability of test media for RF-induced heating model derivation at 64 MHz. Based on simple generic leaded-implants, our preliminary analysis shows that the test medium specified in ASTM 2182 (εr = 78, σ = 0.47 S/m) may be appropriate for the safety assessment of leaded cardio implants with respect to RF-induced heating. Future analysis shall include implants with diverse topology and increased realism.

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