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目的 :提高对小脑幕切迹疝CT表现及解剖学基础的认识。材料和方法 :对临床证实为小脑幕切迹疝93例及对照组100例进行CT扫描 ,观察鞍上池、环池、四叠体及中脑的变化 ;测量中线结构移位数据。结果 :小脑幕切迹疝CT表现为鞍上池缩小变形或闭塞(78/93) ,环池一侧闭塞或完全闭塞(71/93) ,四叠体闭塞(36/93) ,中脑变形和偏移(69/93)。73例表现2个以上脑池闭塞 ,中脑变形偏移均合并多脑池闭塞或环池闭塞。中线结构移位超过15mm (58 /93) ,认为是小脑幕切迹疝的间接CT表现。结论 :小脑幕切迹疝CT表现有一定特征性 ,CT扫描有助于明确脑疝的病因及幕上病变部位。
Objective: To improve CT findings and anatomical basis of tentorial herniation. MATERIAL AND METHODS: Ninety-three cases of clinically confirmed herniation of the tentorium of the tentorium and 100 cases of the control group underwent CT scans. The changes of the suprasellar cistern, peri-cistern, quadruplex and midbrain were observed. Results: The CT appearance of the supratentorial tentorium showed the reduction or occlusion of the suprasellar cistern (78/93), the occlusion or complete occlusion of the cistern (71/93), the occlusion of the quadruplex (36/93), the degeneration of the midbrain And offset (69/93). 73 cases showed more than 2 cerebral pool occlusion, midbrain deformity were combined with multiple pool occlusion or occlusion of the central pool. The midline structure is displaced by more than 15 mm (58/93), an indirect CT manifestation of the cerebellar notch hernia. CONCLUSION: CT findings of cerebellar notch incision hernia have certain characteristics. CT scan can help to clarify the etiology of herniation and the location of supratentorial lesions.