Figure 3From: A statistical investigation of normal regional intra-subject heterogeneity of brain metabolism and perfusion by F-18 FDG and O-15 H2O PET imagingHistogram of z values of metabolism from all 24 regions in all 14 normal subjects. Note the substantial negative (leftward) skew = -0.28 and the shape being leptokurtic with kurtosis = 0.39.Back to article page