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FIG 3. MR imaging after CT study.
A, MR imaging shows a marginally isointense and centrally hyperintense rounded lesion on T1-weighted images, surrounded by a clearly defined hypointense rim.
B, T2-weighted images depict the CT hyperattenuating focus as a hypointense lesion surrounded by thin marginal hyperintensity, which presumably is the CSF of the subarachnoid space.
C, Fluid attenuation inversion recovery (FLAIR) images help confirm the presence of CSF surrounding the hypointense rim. The marginal hyperintensity on T2-weighted imaging most likely represents CSF in light of the signal nulling, which is shown on the FLAIR sequence, as one would expect to see in an area of simple fluid.
D, MR imaging depicts thin bilateral convexity subdural hematomas as hyperintense collections on the Tl-weighted image. A hypoplastic left Sylvian fissure also is noticed.
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