Figure 1.

Baseline global cortical PIB ratio and baseline ventricular volume by clinical diagnosis. Global PIB represents a weighted average of the pre-frontal, temporal, parietal, cingulate precuneus, anterior cingulate and orbito frontal regions normalized to cerebellar retention. Baseline ventricular volume is expressed as a percentage of TIV in each subject. Boxes represent the 25th, 50th and 75th percentiles of the data. Individual points have been randomly shifted along the horizontal axis to reduce overlap.