Safe guidewire visualization using the modes of a PTx transmit array MR system.

ABSTRACT:

Purpose

MRI-guided cardiovascular intervention using standard metal guidewires can produce focal tissue heating caused by induced radiofrequency guidewire currents. It has been shown that safe operation is made possible by using parallel transmit radiofrequency coils driven in the null current mode, which does not induce radiofrequency currents and hence allows safe tissue visualization. We propose that the maximum current modes, usually considered unsafe, be used at very low power levels to visualize conductive wires, and we investigate pulse sequences best suited for this application.

Methods

Spoiled gradient echo, balanced steady-state free precession, and turbo spin echo sequences were evaluated for their ability to visualize a conductive guidewire embedded in a gel phan

SUBMITTER: Godinez F 

PROVIDER: S-EPMC7048617 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature