FIGURE 4.

Axial gray‐scale maps of the fraction of non thin‐bin components $1‐f_{\mathrm{thin}}$ with superimposed ODFs colored by (A) local orientation (with $x$, $y$ and $z$ corresponding to the “left‐right,” “anterior‐posterior,” and “superior‐inferior” directions, respectively) and by (B) $\widehat{\mathrm{E}}[R_1]$ (see Section 2.3). The middle insets zoom on a voxel containing a fiber crossing between the corpus callosum (CC) and the cingulum (CING), and presents the estimated (C) orientation‐colored and (D) $\widehat{\mathrm{E}}[R_1]$‐colored ODFs for this voxel. While differences in $\widehat{\mathrm{E}}[R_1]$ seem to exist between CC and CING, such differences may also exist in the regions where the CST’s pyramidal tracts are located (blue circles), as indicated by the greener $\widehat{\mathrm{E}}[R_1]$‐colored ODFs therein