Figure 4.

Diffuse hypoxic brain injury in a 7-month-old infant admitted following a successful resuscitation of cardiac arrest with associated dilated cardiomyopathy. (a) Unenhanced cranial CT scan on the day of admission shows global reduction in cerebral density with reduced grey/white matter differentiation and a “bright cerebellum sign”. (b) Unenhanced axial T₂ and (c) T₁ weighted MRI scans 4 days following initial CT showing T₂ hyperintensity in the globi pallidi, with subtle T₂ hyperintensity in the putamen and thalami bilaterally. Note the absence of subdural haematoma on the T₁ weighted image. (d) Axial T₂ weighted MRI at 3 weeks following the acute presentation, demonstrating generalised atrophy, particularly affecting the basal ganglia.