Fig. 2From: Quantitative evaluation using single-photon emission computed tomography with acetazolamide is reliable for preoperative evaluation before cardiac surgery in severe carotid intracranial artery stenotic and/or occlusive disease: a case reportSelective internal carotid artery angiography (Right). Severe stenosis with filling delay in right internal carotid artery. Right middle cerebral artery was occluded (arrow) and showed slight contrast with a filling delay through the anterior communicating arteryBack to article page