FIG 3. 39-year-old man with grade IV glioma.

A and B, Axial contrast-enhanced T1-weighted (A) and rCBV (B) images through the level of the lateral ventricles demonstrate an enhancing mass. There is elevated blood volume relative to both normal gray and white matter, consistent with biopsy-proved high-grade glioma (arrow). Note the decreased blood volume in the white matter immediately surrounding the lesion, secondary to the space-occupying effects of vasogenic edema.