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目的：为了正确认识正常大脑镰及纵裂池的ＣＴ表现，以便识别纵裂池出血。方法：本组２１０例，按年龄分七组。ＯＭ线为基线作颅脑轴位ＣＴ扫描，将大脑镰及纵裂池分前、后、上三段讨论。结果：大脑镰绝大多数为细发丝状高密线影。ＣＴ显示率＞９６％，后段大脑镰绝大部份达胼胝体压部或天幕口。前段大脑镰长度大多数≤１５ｃｍ，＜１２胼膝深度。上段大脑镰于侧脑室体上１ｃｍ层面绝大多数呈间断状。前纵裂池及上纵裂池前份，随年龄增大而增宽。而后纵裂池较窄，显示率低。纵裂池与内侧脑沟共同形成低密之形。结论：上述大脑镰及纵裂池正常ＣＴ表现与纵裂池出血的鉴别有重要价值
Objective: In order to correctly understand the normal falx and longitudinal fissure pool CT performance in order to identify longitudinal fissure pool bleeding. Methods: The group of 210 cases, divided into seven groups by age. OM line as the baseline craniotomy CT scan, the falx and longitudinal fissure pool points before and after the discussion on the three sections. Results: The vast majority of cerebral falx hairspray-shaped high-density line shadow. CT display rate of> 96%, most of the latter part of the sickle up to the corpus callosum or celestial orifice. Most of the length of frontal falx disease ≤ 15cm, <12 corpus and knee depth. The upper part of the brain sickle in the lateral ventricle body 1cm vast majority of intermittent. Former longitudinal split pool and the former part of the longitudinal pool, broadening with age. Longitudinal split pool and then narrow, showing a low rate. Longitudinal split pool and the medial sulci together to form a low-density shape. Conclusion: The above normal manifestations of falx and longitudinal fissure pool have important value in differentiating longitudinal hemorrhage