Cite this: Neuroimaging of Ischemic Stroke With CT and MRI ... a volume of brain rapidly infarcts, termed the core, while hypoperfused, but still-viable brain is called the penumbra.

unless normal perfusion could be restored promptly. There are differences in the cause of cellular death between the infarct core (necrosis) and penumbra (apoptosis). In the infarct core ...