Figure 1From: A statistical investigation of normal regional intra-subject heterogeneity of brain metabolism and perfusion by F-18 FDG and O-15 H2O PET imagingThe computer generated 15-degree sectors (A) and ROIs (B) on the PET images displayed in 20 color steps with the mean (z = 0) at the center and each interval representing 0.5 standard deviation ranging from z = -5.0 to +5.0.Back to article page