Investigation of RF-induced Heating of Active Implantable Medical Device in the Vicinity of Fragmented Leads under 1.5T MRI

Motivation: Electrically short fragmented leads are sometimes left behind in the human body after the extraction of an active implantable medical device (AIMD). When a new AIMD is implanted near the fragmented leads, the radiofrequency (RF)-induced heating of the newly implanted AIMD could be altered. Goal(s): Develop a method to evaluate the RF-induced heating of AIMD with fragmented leads in the vicinity. Approach: We propose to use the electric field distribution which includes the presence of the fragmented leads with the AIMD transfer function model for RF-induced heating evaluation. Results: The proposed method can effectively predict the RF-induced heating for AIMDs near fragmented leads. Impact: It was observed that the RF-induced heating for AIMD system can be altered by the nearby fragmented leads.