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Stroke, MRI and 3D CT scans

Stroke, MRI and 3D CT scans

C016/6419

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Credit

ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY

Caption

Stroke. Coloured composite image of a magnetic resonance imaging (MRI) scan of the brain and 2D and 3D computed tomography (CT) scans of the head and shoulders of a 48 year old patient after a cerebrovascular accident (CVA, or stroke). An infarct (area of dead tissue, pink and purple) is seen in the left hemisphere. The infarct is a result of ischaemia, a lack of blood flow to that area of the brain, caused by a blockage in a blood vessel. The blockage may be due to a thrombus (blood clot) or embolism (air bubble or loose blood clot). Strokes can be instantly fatal, or may pass unnoticed. Symptoms can include muscle weakness, behavioural changes or paralysis.

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