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脑动脉瘤是自发性蛛网膜下腔出血最常见病因。据统计约８０％脑动脉瘤分布于颅底动脉环前半部，即颈内动脉颅内段、大脑前动脉、前交通动脉及后交通动脉起始段，脑血管造影至今仍是确诊脑动脉瘤的主要手段，常规采用正侧位投照体位，其中摄正位片时，患者听眦线垂直于检查台面?
Cerebral aneurysm is the most common cause of spontaneous subarachnoid hemorrhage. It is estimated that about 80% of cerebral aneurysms are located in the anterior half of the skull base artery, which is the internal segment of the internal carotid artery, the anterior cerebral artery, the anterior communicating artery and the beginning of the posterior communicating artery. Cerebral angiography is still diagnosed as cerebral aneurysm The main means of routine use of positive lateral projection body position, which is positive when the film, the patient listening 眦 line perpendicular to the inspection table?