MRI-derived periventricular diffusivity contextualizes plasma pTau217 associations with Alzheimer pathology: a discovery–validation study
Background Plasma phosphorylated tau 217 (pTau217) is a promising scalable marker of Alzheimer pathology, but discordance with positron emission tomography (PET) limits context-free interpretation. We tested whether magnetic resonance imaging (MRI)-derived periventricular diffusivity (PVeD) modifies associations betwee...