Implant-friendly MRI of deep brain stimulation electrodes at 7 T.

ABSTRACT:

Purpose

The purpose of this study is to present a strategy to calculate the implant-friendly (IF) excitation modes-which mitigate the RF heating at the contacts of deep brain stimulation (DBS) electrodes-of multichannel RF coils at 7 T.

Methods

An induced RF current on an implantable electrode generates a scattered magnetic field whose left-handed circularly polarizing component ( B1+$$ B{1}^{+} $$ ) is approximated using a B1+$$ B{1}^{+} $$ -mapping technique and subsequently used as a gauge for the electrode's induced current. Using this approach, the relative induced currents resulting from each channel of a multichannel RF coil on the DBS electrode were calculated. The IF modes of the corresponding multichannel coil were determined by calculating the null space of the re

SUBMITTER: Sadeghi-Tarakameh A 

PROVIDER: S-EPMC10543551 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature