Fig.6. Perfusion CT of the brain in a patient with meningioma of the left frontal lobe before and after embolization.

A, B - perfusion CT with estimation of cerebral blood flow and blood volume before embolizaton: A hypervascularized node in the left frontal lobe.
C, D - perfusion CT with estimation of cerebral blood flow and blood volume after embolization: A zone of perfusion absence in projection of a tumor node of the left frontal lobe.