FIG 4. A and B, Contrast-enhanced T1-weighted image (32/8/1) (A) and rCBV map (B) for a patient with glioblastoma multiforme. The rCBV is increased in the region coincident with contrast-enhancement on the T1-weighted image and decreased in the nonenhancing region with possible tumor/edema/post-treatment effects. The contrast-enhancing region was resected and the histologic examination indicated recurrent tumor