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Acute infarct in a 94-year-old woman scanned 12 hours after developing left-sided hemiparesis.
A, Diffusion-weighted image with b = 1000 s/mm2 demonstrates a high-signal area consistent with acute infarct in the right parietal lobe.
B, Diffusion-weighted image at b = 2500 s/mm2 demonstrates the high-signal lesion with greater contrast.
C, Diffusion-weighted image at b = 3000 s/mm2 also demonstrates this high-signal lesion more clearly than at b = 1000.
