Fig. 8.

Optimization of the coronal standard resolution protocol for different ROIs: OFC = mOFC + rACC, ITL = Inferior temporal lobes, TL = Temporal lobes, Amy = Amygdala, and Hippo = Hippocampus + Parahippocampus. For the optimization based on group-average field maps the BS gain depending on slice tilt and z-shim assuming either a negative PE direction (a) or a positive phase encoding direction (b) are shown. To convey how well the optimal parameters derived from group-average fieldmaps to single subjects, the histograms in (c) and (d) show for how many subjects a particular value of slice tilt and z-shim would result in the maximal BS gain based on individual field maps.

The number of subjects for the optimal slice tilt are displayed for each PE direction separately. (e) shows how the optimization for one ROI affects the BS in the other ROIs. As additional ROIs the Whole Brain (WB) and Well Shimmed areas (WS) are shown.