Derivation and utility of an Aβ-PET pathology accumulation index to estimate Aβ load
OBJECTIVE: To evaluate a novel β-amyloid (Aβ)-PET-based quantitative measure (Aβ accumulation index [Aβ index]), including the assessment of its ability to discriminate between participants based on Aβ status using visual read, CSF Aβ42/Aβ40, and post-mortem neuritic plaque burden as standards of truth. METHODS: One thousand one hundred twenty-one participants (with and without cognitive impairmen
