Figure 4.

Post-contrast T₁ weighted imaging (PC T1WI), fluid-attenuated inversion recovery (FLAIR) and apparent diffusion coefficient (ADC) maps for two patients with grade-II ependymomas. ADC intensity is elevated relative to normal brain tissue in the contrast-enhanced lesional regions for the first one (a) and low in the second one (b). PC T1WI, FLAIR and ADC maps for a patient (c) with a non-enhancing lesion (grade III) and a patient (d) with an enhancing lesion (grade III). The ADC is elevated relative to normal brain tissue in the contrast-enhanced lesional regions in the second patient.