New Method to Quantify RF Induced Currents Inside Conductive Wires

Michiel R. van den Bosch¹, Marinus A. Moerland¹, Astrid L. van Lier¹, Lambertus W. Bartels¹, Jan J. Lagendijk¹, Cornelis A. van den Berg¹

Resonant waves can occur along metallic wires used in MRI guided interventions. Since it is hard to state the exact resonant wire length, there is a need for a tool to monitor the tissue heating at the tip of a wire. In this study we have developed a new methodology to estimate the induced current from the B1+ distortion around the wire. With this method we are able to quantify the current profile on wires for resonant and non-resonant conditions. This creates a powerful instrument to investigate the resonance of RF waves along metallic wires used for MRI guided interventions.