White matter maps showing regions of significant correlation between mean diffusivity and measures of disease severity (Bonferroni corrected alpha = 0.0167).

<p>Top row coronal view, bottom row axial view. Background image corresponds to the mean fractional anisotropy image of all subjects in standard MNI152 space (radiological view). Fractional anisotropy white matter skeleton is represented by green voxels. Blue voxels represent regions of decreased FA and yellow voxels represent regions of increased MD in the PSP group.