纵裂池创伤性少量蛛网膜下腔出血CT征象

目的：探讨CT扫描对创伤性纵裂池少量蛛网膜下腔出血的诊断价值。方法：24例颅脑创伤患者，表现为纵裂池少量蛛网膜下腔出血，经过短规CT复查少量蛛网膜下腔出血的阳性征象均消失。结果：24例少量蛛网膜下腔出血表现为前纵裂池高密度影长度增加，8例伴有胼胝体沟征；纵裂池呈局限性羽毛状高密度影，邻近脑沟消失；后纵裂池密度增高增粗，边缘毛糙；复查显示上述征象均消失。结论：局限在纵裂池少量蛛网膜下腔出血CT扫描有特征性表现，与检查时间关系密切，容易漏诊。

Subarachnoid Hemorrhage of Longitudinal Cistern: CT Evaluation

Objective： To investigate the significance of CT scanning in diagnosing mild traumatic subarachnoid hemorrhage of longitudinal cistern （SAHLC）. Methods： 24 cases with brain trauma were studied retrospectively. Follow-- up CT examination of a short-- term suggested that the features of SAHLC disappeared after some time. Results： 24 cases of SAHLC produced the following CT manifestations： widening of anterior longitudinal cistern, some- time SAH visible in callosai sulcus or/and eitigulate sulcus, so-- called ＂callosa[ sulcus sign＂ ; feather＇s configuration of longtitudinal cistern, partial disappearance of contiguous sulcus; widening of posterior longitudinal cistern with a coarse borderline. Conclusion： Mild SAHLC presents some CT features related to examination time and missed diagnosis readily occurs.