Large right-sided frontoparietal subdural collection (maximum thickness = 28 mm), isodense to the cortical grey matter in keeping with a subacute subdural haematoma. There is effacement of the cortical sulci with mass effect on the midline structures and subfalcine herniation.
Another small left parietal hyperdense subdural collection (maximum thickness = 10 mm, mean density = 58 HU) in keeping with acute subdural haematoma.
No cranial vault fracture was seen on the bone window (not shown).