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FIG 1. Representative CT findings in patients presenting with SAH.
A, Diffuse thick SAH in the most subarachnoid cisterns due to bleeding from arterial dissection at A1.
B, Thin localized SAH in the interhemispheric fissure (arrowheads) due to bleeding from arterial dissection at A3.
C, Very thin SAH in the interhemispheric cistern (arrowheads) and in the sulcus of the convexity of the cerebral hemisphere (arrow) due to bleeding from arterial dissection at A2 in the combined group.
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