Fig. 3: Illustration of the diffusion tensor image analysis along the perivascular space (DTI-ALPS) method. | npj Parkinson's Disease

Fig. 3: Illustration of the diffusion tensor image analysis along the perivascular space (DTI-ALPS) method.

From: Diffusion along perivascular spaces as marker for impairment of glymphatic system in Parkinson’s disease

Fig. 3

a Axial susceptibility-weighted imaging (SWI) map at the level of the lateral ventricle body showing the medullary veins that run perpendicular to the ventricular wall (yellow arrow). b Schematic drawing of the spatial relationships between perivascular space and the white matter fibers. c Fiber tracking of projection, association, and subcortical fibers. d Fusion of SWI and color-coded fractional anisotropy (FA) maps. Six regions of interests (ROIs) are located in the areas of projection fibers, association fibers, and subcortical fibers (sphere).

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