Study of RF-Induced Heating in Active Implantable Medical Devices with Open Impedance Leads at 1.5T MRI

Motivation: The RF-induced heating from different configurations of open impedance leads connected to a commercial Pulse Generator (IPG) was investigated. It was observed the RF-induced heating from open impedance leads can behave differently from an intact lead. Goal(s): Heating in the distal end of open impedance leads need to be estimated. Approach: Transfer functions and heating measurements were performed. Results: Most open-impedance configurations led to increased electrode heating with the highest heating occurring when only a single channel of the eight-channel lead was left intact. Additionally, significant differences in heating were found depending on the location of the open impedance. Impact: Patients with open impedance fractured leads could take MR scan with the help of this study.