Correlation between SUVr and pontine volume, sex, and age. Age is significantly correlated with the pontine volume of controls as measured on MRI (a). The line shown is the regression curve. The SUVrp/o of controls and DIPG is plotted against pontine volume (b) and age (c). No correlation was found between SUVrp/o and these parameters. This also applies to SUVrp/c (figures not shown).