Subdural haemorrhage - bilateral
Elderly patient with rapid onset memory loss and headaches.
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CT of the brain demonstrates bilateral subdural haemorrhages which on the right is almost isodense with the adjacent brain. After administration of contrast, the collections are easier to appreciate.
Giving contrast often helps better delineate isodense subdural collections, by not only rendering the cortex hyperdense but also outlining the vessels. In this case, a CTA was performed, showing the vessels (which travel in the subarachnoid space) displaced centrally by the collections.