Monolithic Multi-Scale Modeling of MR-Induced Pacemaker Lead Heating
Paper in proceeding, 2011
Modeling of MR-induced pacemaker lead heating is complicated by, among other things, the multi-scale characteristics of the problem. In this paper, the method of moments is used to model a wide range of length scales of the problem simultaneously including the helix-shaped conducting wires present in the pacemaker lead. A cross-section area conserving meshing scheme for helices is proposed and evaluated. For a relative error of 1%, the meshing scheme reduces the number of thin wire segments needed to model a helix with a factor of roughly 3 to 6, as compared to the conventional approach. In addition, we study the relationship between the maximum induced current on the lead and the number of turns of the helices.
Phantoms
Pacemakers
Coils
MR safety
Heating
Magnetic resonance imaging
Wires
Helix
Implant safety
Lead
Thin-wire approximation
Author
Oskar Talcoth
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
Thomas Rylander
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
Hoi-Shun Lui
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
Mikael Persson
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
13th International Conference on Electromagnetics in Advanced Applications (ICEAA), 2011, Torino, 12-16 September 2011
599 - 602 6046407
978-1-61284-976-8 (ISBN)
Areas of Advance
Life Science Engineering (2010-2018)
Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/ICEAA.2011.6046407
ISBN
978-1-61284-976-8