Table 1.

Homogeneity analysis of an example rat brain (Figs. 1/3) after magnetic field shimming. Major field imperfections remain after static third order SH shimming (Fig. 1) which is reflected by a large residual standard deviation (SD) and broad frequency ranges to cover 80%, 85%, 90% and 95% of the brain voxels (all values in Hertz). In comparison, DYNAMITE shimming removes most magnetic field imperfections in the rat brain (Fig. 3) and allows a substantial narrowing of the frequency distribution.

shim method	SD	80%	85%	90%	95%
static third order SH	58	116	136	171	231
DYNAMITE	22	35	45	60	91