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‐selective excitation with a spatially inhomogeneous B 1 . This new pulse can generate a uniform, arbitrary flip angle that is determined by four adjustable phase shifts in the pulse. Self‐refocused slice selection is achieved by modulating a B o gradient in concert with the pulse frequency (or phase) modulation. B 1 ‐compensated, self‐refocused slice selection is demonstrated in computer simulations and phantom experiments using a surface transmitter/receiver coil. This adiabatic pulse can provide optimal performance in multislice MRI and localized spectroscopy when transmitting with an inhomogeneous B 1 .