Fig. 1.
Baseline and follow-up SUVR images for the CNnn, CNnp, and CNpp group. Baseline and follow-up SUVR images for 3 randomly selected participants in each group. Abbreviations: CNnn, cognitively normal, PiB− at both scans; CNnp, cognitively normal, PiB− at first scan but PiB+ at second scan; CNpp, cognitively normal, PiB+ at both scans; SUVR, standardized uptake value ratio.