Parallel Transmit with Toroidal Transceiver for Enhanced Visualization & RF Safety

Maryam Etezadi-Amoli¹, Pascal Stang¹, John M. Pauly¹, Adam B. Kerr¹, Greig C. Scott¹

We built a transmit-receive toroid that allows positive-contrast visualization of conductive structures, such as guidewires and EP ablation devices, with at most minimal modification to these devices. By actively driving the conductive structure with very low power levels, the conductor body and tip can be clearly visualized with extremely high SNR. RF safety can be ensured by using parallel transmit with an array of surface coils and treating the transceive toroid and conductive wire as an additional, actively controllable element of the transmit array.