"post-cardiac arrest hypoxia"
"White cerebellum sign, also called reversal sign or dense cerebellum sign, is encountered when there is a diffuse decrease in density of the supratentorial brain parenchyma, with relatively increased attenuation of the thalami, brainstem and cerebellum 3. This sign indicates irreversible brain damage and has a very poor prognosis, which is why radiologists must be aware of this sign 2."
"There are different theories proposed for this sign:"