CT Findings in Chronic Subdural Haematomas

As a result of computerised tomography the neuroradiological diagnosis of subdural haematomas has completely changed. Nowadays, angiography is rarely necessary. While the acute subdural or extradural haematomas shows a typical image (Fig.14.1) of a lens-shaped area of high density between the bone of the skull and the surface of the brain, CT findings in chronic or subchronic subdural haematomas are different. This seems to depend on the age of the haemorrhage and the stage of the morphological or pathophysiological changes.