Fig. 4.

This figure visualizes the performance, measured by the voxelwise absolute mean deviation from zero of the log-transformed Jacobian maps, for different sequence types. Based on the assumption of no brain structural difference, a sequence is defined to have better performance if it has a lower absolute mean deviation. Visually, SPGR acquired using a birdcage coil with N3 correction performs the best overall. This is confirmed using permutation tests as shown in Tables 2–5.