Fig. 8.

Fetal and postnatal diffusion tensor imaging corticospinal tract segmentation in a boy (case 2) with periventricular leukomalacia and cortical dysplasia. a–d Age 24+2 gestational weeks. a Coronal view of the segmented corpus callosum (blue) and bilateral corticospinal tracts (right, yellow; left, green). b Sagittal view of the segmented tracts shows the right corticospinal tract (yellow) to be present and intact. c Sagittal view of the segmented tracts shows the left corticospinal tract to appear discontinuous (arrowhead). d Overlay of the fiber tracts on an axial T2-weighted image for orientation. e–h Age 2 years. e Coronal view of the segmented corpus callosum (blue) and bilateral corticospinal tracts (right, yellow; left, green). f Sagittal view of the segmented tracts shows the right corticospinal tract (yellow) to be present and intact, although somewhat sparse. g Sagittal view of the segmented tracts shows the left corticospinal tract (green), appearing intact. h Overlay of all fiber tracts on an axial T2-weighted image for orientation