Adam B. Kerr1, William A. Grissom1, Pascal Stang1, Greig C. Scott1, John M. Pauly1
1Electrical Engineering, Stanford University, Stanford, CA, USA
RF current sensor feedback from a parallel transmit array was used to determine a matrix operator describing the RF voltages to apply to all coils to achieve a desired RF current in a single coil. The vector-decoupled array presented smooth and non-zero B1 maps which facilitated B1 mapping and should reduce spatial resolution requirements. Vector decoupling also enabled iterative predistortion of the parallel RF waveforms which improved RF fidelity and experimental parallel transmit excitation profiles.