**9.2 Vascular**

Infarct—MRI findings show Gray and white matter involvement, wedge like vascular distribution associated with restricted diffusion and low signal.

Subdural hematoma: anemia, retinal hemorrhage.

Bleeding—homogenous, clears quickly, residual hemosiderin ring.

Treatment-related necrosis—central hypodensity, edema, >6 months after radiation therapy or chemotherapy, metabolic scan shows low activity.
