Monolithic Multi-Scale Modeling of MR-Induced Pacemaker Lead Heating
Paper i 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

Författare

Oskar Talcoth

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

Thomas Rylander

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Hoi-Shun Lui

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

Mikael Persson

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

13th International Conference on Electromagnetics in Advanced Applications (ICEAA), 2011, Torino, 12-16 September 2011

599 - 602 6046407

Styrkeområden

Livsvetenskaper och teknik

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/ICEAA.2011.6046407

ISBN

978-1-61284-976-8