Parenchymal CSF fraction is a measure of brain glymphatic clearance and positively associated with amyloid beta deposition on PET. - Zhou L; Nguyen TD; Chiang GC; Wang XH; Xi K; Hu TW; Tanzi EB; Butler TA; de Leon MJ; Li Y (Alzheimer's & dementia : the journal of the Alzheimer's Association, 2024)