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FIG 1. 54-year-old man with right hemiparesis.
A–D, Diffusion-weighted images (b = 1000 s/mm2) illustrate volume of abnormality. Three-dimensional volume of abnormality was found by summing the areas of abnormality on each section (arrows) and multiplying by section thickness. The same approach was used to compute volumes of MR perfusion abnormality.
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