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Fig 4. A and B, Postcontrast T1-weighted (TR/TE, 650/13 ms) axial image (A) and base image from perfusion CT study (B) in a 46-year-old man with a heterogeneously enhancing mass lesion predominantly involving the right frontal lobe with extension across the genu of the corpus callosum. C and D, Perfusion CT PS (C) and CBV (D) maps showing high permeability (PS = 2.04 mL/100 g per minute) and tumor blood volume (CBV = 2.21 mL/100 g). Histopathology revealed a grade III anaplastic astrocytoma.
