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目的 :探讨CT对蝶筛区域解剖结构的评价能力 ,以期为功能性内窥镜鼻窦外科手术提供帮助。材料和方法 :冠状和横轴位薄层CT扫描 5 4例无病变的蝶筛区域 ,并重建矢状位图像。结果 :CT图像中蝶上筛房出现率 13 0 %。蝶窦气化CT分型中 ,甲介型占 8 3 % ,半鞍型占 5 1 9% ,全鞍型占 39 8%。蝶窦中隔居正中位置占 2 4 1%。蝶窦的其他变异有 :翼突气化、前床突气化、蝶骨大翼气化和蝶骨小翼气化。视神经管纵轴与蝶筛窦的毗邻关系在CT图像上分为三型 ,视神经管横轴对蝶筛窦的压迫关系分为四型 ,并统计出各型的分布情况。结论 :CT扫描能显示蝶筛区域与功能性内窥镜鼻窦外科手术有关的绝大部分解剖结构及其变异 ,对手术有很大的指导作用。
OBJECTIVE: To evaluate CT’s ability to evaluate the anatomical structure of the butterfly sifter area in order to provide a useful guide for functional endoscopic sinus surgery. MATERIALS AND METHODS: CT scans were performed in 54 patients with no lesions in the butterfly screen area by coronal and transverse axial thin sections, and the sagittal images were reconstructed. Results: The appearance rate of the butterfly on the CT image was 130%. In the spleno-sinusoid CT classification, 83.3% of the cases were type A, 51.9% of the half-saddle, and 39.8% of the total saddle. The sphenoid sinus in the median position accounted for 2 4 1%. Other variations of the sphenoid sinus include wing gasification, gasification of the anterior chamber, gasification of the sphenoid wing, and gasification of the sphenoid winglet. The relationship between the longitudinal axis of the optic canal and the butterfly ethmoid sinus is divided into three types on the CT images. The compression relationship of the lateral axis of the optic canal to the butterfly ethmoid sinus is divided into four types, and the distribution of each type is calculated. Conclusion: CT scan can show most of the anatomical structures and variations of the butterfly screen area related to functional endoscopic sinus surgery, which has a great guiding effect on the operation.