Fig 6. Within-subject variability in ROIs.

Computed within-subject CVs (wsCV) are shown for M, OEF and CMRO₂ within each ROI. The model-derived estimates are represented by different colors, while the three combinations of tests are identified by distinct patterns: 1: Test A vs. B under the LHO protocol (squared pattern), 2: Test A vs. B under the HHO protocol (plain pattern), 3: Tests A between both HO protocols (striped pattern). GM = gray matter, IP = inferior parietal, SP = superior parietal, PRE = precuneus, HIP = hippocampus, AC = anterior cingulate, PC = posterior cingulate.