Keywords: Safety, Modelling, AIMD
Motivation: To understand the interchangeability the IPGs for an AIMD system under MR RF exposure.
Goal(s): To evaluate/compare the effect of AIMD input impedance on both the RF-induced heating and the RF-induced voltage under RF exposure.
Approach: Evaluate the AIMD models for both RF-induced heating/voltage using an implantable lead connected to IPGs with different input impedances. The AIMD models (transfer functions) are evaluated via the reciprocity approach.
Results: When the lead characteristic impedance and IPG impedance differ greatly, the device heating stays consistent. However, the induced voltage changes. Both RF-induced heating/voltage are crucial for the interchangeability of IPGs for an AIMD system.
Impact: This study emphasizes the significance of on the RF-induced voltage at the IPG in addition to heating at the distal end. The analysis method presented could serve as a valuable approach for assessing the interchangeability of IPGs for AIMDs.
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