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FIG 3. Acute infarct in an 82-year-old man scanned at 22 hours.
A, Diffusion-weighted image with b = 1000 s/mm2 demonstrates a high-signal area consistent with acute infarct in the right basal ganglia along the posterior lenticular nucleus. The posterior horns of the lateral ventricles are prominent.
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 lesion more clearly than at b = 1000; anisotropic effects are evident in the contralateral internal capsule and corona radiata.
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