纵裂池出血的CT诊断

CT Diagnosis of Hemorrhage in Interhemisperic Fissure Cistern

目的：旨在提高即时确诊纵裂池出血的能力。材料与方法：搜集经ＣＴ复查确诊纵裂池出血３０例。另顺序取自我科正常颅脑ＣＴ２１０例资料作对比。均作轴位ＣＴ扫描。按Ｚｉｍｍｅｒｍａｎ等提法，将大脑镰及纵裂池以胼胝体和侧脑室为界分为上、前及后三部分分析。结果：纵裂池出血呈一高密度稍宽线影；高密度“之”字征；前纵裂高密度线影延长；＞１／２胼胝体膝深度或＞１５ｍｍ；于侧脑室上１ｃｍ层面即呈一连贯完整线影；天幕切迹增厚。

Objective: To improve the ability to definite diagnosing promptly the hemorrhage of interhemispheric fissrure cistern. Materials and Methods:30 CT scanning cases of hemorrhage in the interhemispheric fissure cistern were collected, which were definitely diagnosed as such by correlation with their repeated CT scanning. In addition, 210 cases of normal cranial CT scanning were gathered consecutively from our department for comparison. Axial CT scanning were performed in all of them. The cerebral falx and the interhemispheric fissure cistern were divided into superior, anterior and posterior segments by the corpus callosum and lateral ventricles according to Zimmerman′s description. Results:Hemorrhage in the interhemispheric fissure cistern presented as a slightly widening hyperdense line; zigzag hyperdense line; elongation of hyperdense line within the anterior segment of the internemispheric fissure,which was longer than 15mm or half the depth of the genu; thickening of the tentorial incisure margin; superior segment demonstrated as a continuous hyperdense line just in the level 1cm above the lateral ventricular body. Conclusion:Comparing with the normal falx CT appearance, all the CT appearances mentioned above have of diagnostic significance in hemorrhage in the interhemispheric fissure cistern.