Electromagnetic Modeling of Pacemaker Lead Heating During MRI
Rapport, 2011
The electromagnetic part of pacemaker lead heating during magnetic resonance
imaging (MRI) is a resonant phenomenon which is complicated by, among other
factors, the wide range of length scales involved in the problem. In this work, the
multi-scale part of the problem is taken into special consideration during the modeling
process. The model incorporates a radio frequency coil, a human body phantom,
and a highly detailed model of a pacemaker system with a bipolar lead.
Several configurations of pacemaker systems exposed to MRI are modeled and the
results clearly show the importance of detailed lead modeling. Furthermore, modeling
of resonant structures is investigated by a comparison between different modeling
techniques.
Lead Heating
Thin-wire Approximation
MR Safety
Helix
Pacemakers
Implant Safety
Magnetic Resonance Imaging