Figure 6.

Influence of spatial resolution, localized shimming, and smoothing on the mean BOLD signal intensity (A) and tSNR (B) within the NFA. The mean BOLD signal is largest in the high-resolution images. Before smoothing, the tSNR is similar in the high-resolution and the lower-resolution images with and without localized shimming. After spatial smoothing was applied, the tSNR is largest in the high-resolution images. LR, lower resolution (3*3*3 mm³); LRS, lower resolution with localized shimming; HRS, high resolution (1*1*1 mm³) with localized shimming. *p < 0.05; **p < 0.01; ***p < 0.001 (Fisher LSD).