ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Stroke. Axial magnetic resonance imaging (MRI) scans through the brain of a 54-year-old woman who has had a stroke that has caused partial left-side hemiplegia (paralysis of one side of the body). These scans were performed 2 hours after the stroke. The damaged area of the brain is at upper left and centre left in each image, on the right-hand side of the brain. This stroke (also called a cerebrovascular accident, CVA) is due to reduced blood supply (ischaemia), probably due to a blockage of an artery. These scans are T2 sequence MRIs, with inversion used to highlight the tissues being examined. The sequence starts at the level of the eyes (top left), with the subsequent scans (left to right and top to bottom) at higher levels in the brain, ending at lower right.
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