FIGURE 5.

DKI images showing diffusion-encoded color DEC-map (A), and mean and radial kurtosis (B and C, respectively). Nonzero Kurtosis means non-Gaussian diffusion, with positive kurtosis indicating that the distribution is more peaked. In terms of neuronal tissue, this is often caused by restricted diffusion, as for instance is the case inside axons. Arrows indicate the posterior limb of the internal capsule (similar to Fig. 2), wherein the high radial kurtosis is an indication of restricted diffusion perpendicular to the main fiber orientation (CST). Acquisition: 112 × 112 matrix with 22.4 × 22.4 cm field-of-view, 70 axial slices of 2 mm thickness. 6 b = 0 images, 60 gradient directions at b ¼ 1200 s/mm² and 60 gradient directions at b = 2500 s/mm². TE/TR = 107 ms/10.3 s, acquisition time 21m33.