Optimization of 1D RF Pulses with Parallel Transmission

Ulrich Katscher¹, Kay Nehrke¹, Peter Boernert¹

Usually, Transmit SENSE is applied to improve spatially selective RF pulses in two or three dimensions. This study investigates the application of Transmit SENSE to one-dimensional RF pulses. For these RF pulses, Transmit SENSE is applicable in case of large B1 variations across the slice or slab to be excited as found for 3D volume imaging or REST. 1D Transmit SENSE can improve the excitation profile and reduce the required RF power. The approach was tested in vivo in the framework of a commercial 3T system with two transmit channels using the recently developed, ultrafast B1-mapping technique DREAM.