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Table 2: 
Summary of WM metrics
Diffusion MR ImagingParameterExplanation
DTIFAOverall direction of water diffusion in brain tissue
Mean diffusivityThe magnitude of isotropic diffusion in brain tissue
Axial diffusivityThe coefficient of diffusion across the long axis of the ellipsoid
RDThe coefficient of diffusion perpendicular to the long axis
NODDIIntracellular volume fractionNeurite density based on intracellular diffusion
Orientation dispersion indexDispersion of neurites in the intracellular compartment
ISOVFThe measure of extracellular water diffusion