Fig. 2

Distribution of PET_SCORES per method. Distribution of subjects’ PET_SCORES from FDG SUVR, R₁, ePIB (20–130 s), and ePIB (1–8 min) respectively from left to right. Darkest grey boxes represent data from the AD group; dark grey represents MCI+ subjects; light grey represents MCI−; and white represents HC. A dashed line at PET_SCORE = 1 represents the threshold from PALZ for the classification of AD patients. The stars represent the differences between the groups that are statistically significant