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Fig. 2E. —77-year-old man with acute middle cerebral artery stroke (main lesion of infarction is not shown). Gradient-echo T2^*-weighted image (250/15; flip angle, 20°) shows mild hypointensity (arrow) in involved sulci. This is likely caused by focal magnetic inhomogeneity from content (deoxyhemoglobin) of blood pool due to alteration of hemodynamics and suggests venous congestion.

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