Fig. 3.

Effect of motion and eddy current correction and tensor fitting methods on the estimated diffusion-weighted (DW) image in z-direction (S₂₅) using (a)–(f) methods (i)–(vi) as listed in Table 2. The effects are presented for subject 2 in the C2 ROI (slice position is depicted in Fig. 1, see red horizontal line). The left wing of the butterfly-shaped grey matter structure (highlighted) becomes more apparent after motion and eddy current correction (c, e, and f). The 3D-affine motion and eddy current correction (b) spuriously reduced the image intensity of the estimated S₂₅ map when used in combination with ordinary least square fitting.