Findings:
Diffuse brain oedema with loss of normal grey white differentiation and complete sulcal effacement. Also, slit-like effacement of the lateral and third ventricles with mid brain compression.
Hypoattenuation of the cerebral hemispheres and especially basal ganglia with sparing of the cerebellum is seen along with hyperdense falx cerebri and tentorium cerebelli relative to brain parenchyma.
The cerebellum appears relatively unremarkable. No subfalcine, uncal or tonsillar herniation. No intracranial haemorrhage.
No skull fracture or bony abnormality.
Mild mucosal thickening is seen in the ethmoid, sphenoid and maxillary sinuses bilaterally. NG tube in situ. Cigarette retention in the nasal cavities and the nasopharynx.
Impression:
Features of global hypoxic-ischemic brain injury with diffuse oedema and mass effect with no tonsillar and uncal herniation.