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FIG 2. Patient 1. A 33-year-old man with early chronic intracerebral hematoma on MR images obtained 40 days after symptom onset.
A, CT scan (left) 12 days after symptom onset shows a hyperattenuating hematoma primarily in the right external capsule between the lateral putamen and the insular cortex. T1-weighted image (middle) shows a hypointense cavitary lesion in the right external capsule. FLAIR image (right) reveals subtle hyperintensity of the deep gray matter in the caudate head, putamen, thalamus, and part of the insular cortex.
B, Diffusion-weighted image (left) shows obvious hyperintensity in the caudate head, putamen, and thalamus, which are separate from the hematoma itself. No other diffusion abnormality is seen. ADC map (right) shows decreased ADC in the caudate, putamen, and thalamus; ADC ratios relative to contralateral gray matter were 0.75, 0.79, and 0.80, respectively. This suggests that the diffusion abnormality is impaired intracellular diffusion rather than a T2 shine-through effect.
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