(a) Contrast-enhanced T1-weighted image shows a butterfly glioblastoma, involving the genu of corpus callosum. (b) The right aspect of the lesion appears to be heterogeneously contrast enhanced. (c) On rCBV map, the nonenhanced left aspect of the tumor (arrow) shows high rCBV (arrow in (c)). This helps differentiate tumor infiltration from perifocal edema.
