Transmit B1 Field Pattern Control Using RF Current Source Technique

Wonje Lee¹, Eddy B. Boskamp¹, Thomas Grist², Krishna Kurpad²

In this work a two-channel parallel excitation system incorporating an RF current source technology is described and its practical use is demonstrated at 3T in a head size volume transmit coil. The B1 field pattern was successfully controlled by the current source integration without using any other decoupling strategies, which has the potential to improve parallel transmit systems by forcing the drive currents into current elements in load dependent transmit environments at high fields.