Figure 1.

Centile ranges of volume across ages 60–85 years, for ventricle (left) and hippocampus (right). Recall region volumes are normalised by the ICV value as they represent a percentage of volume within the intracranial cavity. Ranges up to the 100th centile henceforth denote the empirical maximum volume for that region. Volume centiles; 75–100th from blue (0.75) to top dotted line, 50–75th from green (0.25) to blue (0.75) line, 25–50th from red (0.25) to green (0.50) line and 15–25th from black (0.15) to red (0.25) line. AD, Alzheimer's disease; HC, healthy control; ICV, intracranial volume; MCI, mild cognitive impaired.