Enhanced RF Excitation Homogeneity by Combining TEM and Counter Rotating Current Surface Coil Array: Numerical Simulations and Experiments at 4.0 T

Sukhoon Oh¹, Nikolai I. Avdievich², Hoby P. Hetherington², Christopher M. Collins¹

Here we present simulated and experimental results combining an array of counter rotating current (CRC) surface coils and a TEM volume coil in transmission. The combination provides better homogeneity than the TEM alone for excitation, and simulated results are in good agreement with experiment for combining a 4-element array with the TEM. Further simulation shows a much improved result for increasing the number of CRC coils in the array to 8.