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Initial axial non-contrast computed tomography of the head. A: Extravasated blood predominantly in the perimesencephalic subarachnoid space within the extension into bilateral ambient cisterns; B: Extravasated blood predominantly in the quadrigeminal cistern and chiasmatic cisterns; C: Extravasated blood predominantly in the quadrigeminal cistern and chiasmatic cisterns; D: The third ventricle was slightly ectatic.
