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Association RSI measures and Aβ42 levels. ND and IF are plotted against Aβ42 levels (ng/ml). Values are shown for HC (blue), MCI (green), and AD (red) participants. Aβ amyloid-β, AD Alzheimer’s disease, HC healthy controls, IF isotropic free water diffusion, IFOF inferior fronto-occipital fasciculus, ILF inferior longitudinal fasciculus, MCI mild cognitive impairment, MD mean diffusivity, ND neurite density
