Fig. 1: PCS hyperintensity not visible on conventional MRI.

Axial slices of three representative glioblastoma patients. a T1w; b T2w; c FLAIR; d T1w-Gd; e ADC; f nCBV; g Ktrans (color scale) overlapped to the T1w-Gd (gray-scale); h PCS; i PCS on top of which the color-coded lesion segmentation masks are visualized and a zoomed view (dashed rectangle) of the lesion area (green: edema; blue: necrosis; red: enhancing tissue). White arrows indicate the PCS hyperintensity in edema.