Stroke. Coloured computed tomography (CT) scans of axial sections through the head of a 62-year-old patient with a stroke. The front of the brain is at top and right hemisphere is seen at left in the sections. A large infarct (dead tissue, dark patches at right) is seen in the sylvian fissure of the left hemisphere. The infarct is a result of ischaemia, a lack of blood flow caused by a blood vessel obstruction. 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.
Model release not required. Property release not required.