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Whirlpool sign:
CT of acute epidural hematoma is overwhelmingly a uniform, high-density, convex lensular image
The formation of "vortex signs" in acute epidural hematomas differs from the principle of uneven density of acute subdural hematoma formation, which is caused by the rupture of the arachnoid membrane, where
Picture above: hematoma that does not start large; Below 2: Acute massive epidural hematoma (vortex sign shown by arrow)
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