蛛网膜下腔出血的CT诊断(附200例分析)

目的：探讨蛛网膜下腔出血（SAH）的病因及CT表现，方法：选择经腰穿或CT复查证实为SAH的病例200例，结合部位及其它检查分析其病因及CT表现，结果：外伤性98例，其中单纯性20例，合并其他颅内损伤78例，自发性80例，血管畸形所致20例，由动脉瘤所致15例，其它45例，新生儿缺血缺氧性脑病22例，CT表现为纵裂池出血80例（表现为纵裂高密度影增宽75例，纵裂高密度影延长32例，侧脑室体部上10mm层面内出现条状高密度影15例，天幕切迹变厚，天幕区密度增高30例）；其它脑池偏密征102例，脑沟密度增高85例，结论：脑池肮脏了沟密度增高为SAH的CT表现，CT检查为SAH的诊断快捷，准确，且无痛苦，无危险。

CT diagnosis of subarachnoid hemorrhage (an analysis of 200 cases)

Objective:To study the causes and CT findings of subarachnoid hemorrhage (SAH).Methods:200 cases with SAH were confirmed by CT follow up and lumbar puncture.Their etiologies and CT findings,together with the location,were analyzed.Results:200 cases of SAH were secondary to trauma in 98 cases,including simple trauma in 20 and other complicated intracranial injuries in 78; spontaneous hemorrhage in 80 cases,including vascular malformation in 20,cerebral aneurysm in 15,and other causes in 45;hypoxia ischemic encephalopathy (HIE) of neonate in 22 cases.CT demonstrated interhemispheric cistern hemorrhage of 80 cases,which revealed increased density and widening of hemispheric cistern in 75 and elongation of hemispheric cistern in 32,respectively;strap hyperdensity at the level of 10mm above the body of the lateral ventricle in 15,thickening of tentorium and increasing of tentorium density in 30.In addition, hemilateral cisternal hyperdense sign in 102 was documented,as well as the increased density of cerebral sulci in 85. Conclusion: The increased density of cerebral cistern and sulci is the CT feature of SAH.CT is a fast,accurate,and safe method in the diagnosis of SAH.