SINGLE-SHOT, B-1-INSENSITIVE SLICE SELECTION WITH A GRADIENT-MODULATED ADIABATIC PULSE, BISS-8

An adiabatic pulse has been developed to accomplish uniform slice-sele ctive excitation with a spatially inhomogeneous B-1. This new pulse ca n generate a uniform, arbitrary flip angle that is determined by four adjustable phase shifts in the pulse, Self-refocused slice selection i s achieved by modulating a B-0 gradient in concert with the pulse freq uency (or phase) modulation. B-1-compensated, self-refocused slice sel ection is demonstrated in computer simulations and phantom experiments using a surface transmitter/receiver coil. This adiabatic pulse can p rovide optimal performance in multislice MRI and localized spectroscop y when transmitting with an inhomogeneous B-1.