149

FIGURE 149-1

FIGURE 149-2

FIGURE 149-3

FIGURE 149-4

FIGURE 149-5

FIGURE 149-6

FINDINGS Figure 149-1. Axial T1WI through the corona radiata. There are bilateral almost symmetrical crescentic extraaxial hypointense collections—almost cerebrospinal fluid (CSF) intensity (arrows). There is bilateral convexity sulcal effacement. Figure 149-2. Axial FLAIR through the same level. The bilateral extraaxial collections are hyperintense, higher than CSF intensity (arrows). Figure 149-3. Axial T2WI through the same level. The collections are hyperintense (about CSF intensity) with some effacement of convexity sulci but no midline shift. Figure 149-4. Axial GRE through the collections. There is “blooming” (arrows) within the medial membrane of the predominantly hyperintense crescentic collections. This may suggest early calcification or acute blood product. Figure 149-5

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