Figure 1 Mean cortical [¹¹C]PIB SUVR plotted against CSF Aβ_1-42 (A) and CSF t-tau (B) and the composite FDG-PET (C) measure for all subjects

Cutoffs for PIB SUVR and each biomarker are marked on each axis and were defined in separate cohorts as described in the text. PIB = Pittsburgh compound B; SUVR = standardized uptake value ratio; Aβ _1-42 = 42 amino acid β-amyloid protein; t-tau = total tau; FDG = [¹⁸F]fluorodeoxyglucose; MCI = mild cognitive impairment; AD = Alzheimer disease.