The caudate nuclei are now of reduced attenuation and there is subtly decreased grey-white matter differentiation within the lentiform nuclei. Relatively preserved density of the posteromedial thalamus compared to the anterolateral component. Grey-white matter differentiation at the cortex is preserved with no evidence of cortical infarction. No intracranial haemorrhage. No hydrocephalus.
Conclusion: Decreased attenuation of the basal nuclei is almost certainly a sequelae of arrest.