Article Figures & Data
Figures
- fig 1.
Case 1: 67-year-old man with word-finding and comprehension difficulties imaged 4 hours (top row) and 4 days (bottom row) after symptom onset. The T2-weighted (T2W), diffusion-weighted (Isotropic DWI), and Dav images were all normal at 4 hours; but at 4 days, the T2-weighted image showed an area of infarction in the left parietal region (arrows).
- fig 2.
Case 2: 65 year-old man with mild to moderate aphasia, a slight left-sided facial droop, and minimal left pronator drift scanned 3.5 hours (top row), 13 hours (middle row), and 4 days (bottom row) after symptom onset.
Top row, Initial T2-weighted (T2W), diffusion-weighted (Isotropic DWI), and Dav images were normal, but the perfusion MR image revealed a large area of delayed flow in the right MCA territory.
Middle row, At 13 hours, the T2-weighted image remained normal but diffusion-weighted hyperintensity and reduced Dav are now apparent in the right MCA territory.
Bottom row, T2-weighted image at 4 days revealed hemorrhagic infarction with edema and mild mass effect. The infarct showed decreased Dav at this time, while the perilesional edema had increased Dav.
Tables
Calculated diffusion constants (Dav) × 10−3 mm2/s (mean ± SD) in 5- × 5-mm regions of eventual infarction (as identified on follow-up MR images) and in contralateral hemisphere
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