The summarized plots of similarity of cortical metrics in TS30. The plot summarizes the similarity (Spearman’s rho) of the cortical metrics. The similarity measures were from those in Fig. 7, Fig. 8, and classified into four types: within-subject & within-scanner (Subject N = 26, combination n = 16); within-subject & between-scanner (Subject N = 4, combination n = 40); between-subject & within-scanner (Subject N = 30, combination n = 250); and between-subject & between-scanner (Subject N = 30, combination n = 1200), where the combination n denotes a total number of similarity values used for statistics in the matrices in Fig. 7, Fig. 8. Non BC: non biasfield corrected.