Stroke. Coloured axial (horizontal) CT (computed tomography) scan through the head of a 65-year-old patient who has had a cerebrovascular accident (CVA, or stroke). A stroke occurs when blood flow to the brain is interrupted or reduced, causing death of brain tissue. The CT scan has revealed internal bleeding that formed a haematoma (white area, right of centre). The scan is at the level of the brain structures called ventricles (dark central areas), and cerebrospinal fluid has leaked from the ventricles at right. This view looks up through the body, with the front of the brain at top, thus the haematoma (in the capsulo-thalmic region) is in the left-hand side of the brain.
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