Fig. 3

Scatter and Bland-Altman plots. Scatter plots (first column) showing PET_SCORES from R₁ parametric maps (top), ePIB (20–130 s) (middle), and ePIB (1–8 min) images (bottom) (y-axis), and from FDG SUVR (x-axis). The dashed lines display the identity line. Results of the linear regression are given in boxes at the bottom right corner. Bland-Altman plots (second column) showing the difference between the PET_SCORES provided by R₁ (top), ePIB (20–130 s) (middle), and ePIB (1–8 min) and FDG SUVR. The full line is at the mean difference value for all scores, and the dashed lines delimit the 95% agreement interval (at mean ± 1.96 × standard deviation). Data are arranged according to subject group: circles represent the AD, triangles the MCI+, squares the MCI−, and cross the HC group