Reducing and Monitoring Resonant Heating in MR Guidewires
Overall W, Venook R, Pauly J, Smith S, Scott G
In this work, we studied the feasibility of lossy capacitive top-loading for reduction of RF guidewire heating. We monitored interactions with temperature measurements and optically-coupled MR-compatible RF current transducers. Preliminary results indicate that lossy dielectric loading proximally can reduce resonant heating distally in a guidewire under MRI. In future it may be possible to combine these loading and current-monitoring techniques to detect and prevent unsafe RF interactions during interventional MRI procedures.