Fig. 3.

Spatial probability distribution of basal ganglia T2*w hypointensities. The generated spatial distribution maps of T2*w hypointensities are shown overlaid on axial and coronal slices of the 2 mm isotropic T1w reference volume of the representative subject used for non-linear registration. For comparison, the coronal slices approximately correspond to the coronal slices in Feekes et al. (2005), which show the vascular territories of the lenticulostriate arteries (LSA), recurrent arteries of Heubner (RHA), and anterior choroidal arteries (AChA). The spatial probability distribution of these focal T2*w hypointensities indicates a high density inside the globus pallidus (green region), which coincides with the point of entry of the lenticulostriate arterioles into the brain parenchyma; however, their density tends to decrease towards the internal capsule, putamen and caudate.