Spatially Varying Fat-Water Excitation Using Short 2DRF Pulses

摘要

Conventional spatial-spectral RF pulses excite the water or the fat spins in a whole slice or slab. While such pulses prove useful in a number of applications, their applicability is severely limited in sequences with short TR, due to the relatively long duration of the pulses. In the present work, we demonstrate that, by manipulating the parameters of a 2DRF pulse designed to excite a 2D spatial profile, the chemical-shift sensitivity of the pulse can be exploited to obtain potentially useful spatially varying fat-water excitation patterns.