Mapping the B1 field distribution with nonideal gradients in a high-resolution NMR spectrometer

To understand the behavior of many NMR experiments, it is important to determine the spatial distribution of the B-1, field, In this paper, we show how this distribution can be mapped independently of spin density, coil responsiveness, and nonlinearities of the B-0 field gradients. As a by-product we obtain a map of the (possibly nonlinear) spatial variation of the B-0 field gradients used in the imaging procedure. (C) 1999 Academic Press.