Figure 1.

Forty-five-year-old female. Postruptured anterior communicating artery aneurysm clipping. Angiography was done on the ninth day after the subarachnoid hemorrhage. Red, yellow, and green indicate the internal carotid artery, the middle cerebral artery, and the anterior cerebral artery, respectively. (a) Time-density curve for contrast medium for preintra-arterial injection of vasodilator. (b) Integration curve for contrast medium for preintra-arterial injection of vasodilator. (c) Time-density curve for contrast medium for postintra-arterial injection of vasodilator. (d) Integration curve for contrast medium for postintra-arterial injection of vasodilator.