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Figure 1. Cerebral Infarction.
Computed tomographic scans were obtained in a 77-year-old man with sudden onset of dense left-sided hemiparesis. Noncontrast scans performed 2 1/2 hours after the onset of symptoms (Panel A and Panel B) show early changes in the distribution of the right middle cerebral artery characteristic of an infarct. In Panel A, the normal gray-white differentiation is seen at the insular cortex on the left (arrowheads) but is absent on the right, a finding referred to as the insular ribbon sign. In addition, the right sylvian fissure is effaced relative to the left fissure. The scan in . . . [Full Text of this Article] |
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