Natalia Gudino1, Mark A. Griswold1, 2
1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States; 2Department of Radiology, Case Western Reserve University, Cleveland, OH, United States
A multi-turn transmit surface coil design is presented to improve B1 efficiency when driven by on-coil current source amplification. Benchtop and 1.5 T MRI experiments showed a three-fold increase in B1 at same amplifier output current and without increasing heat dissipation in the amplifier. This gain in B1 allowed the use of lower power rated FETs that present lower port capacitances which could improve the overall performance of the on-coil current source transmitter and its multiple-channel implementation.