筛窦以中鼻甲基板为界，分为前后组筛 窦，前组筛窦（anterior ethmoid sinus）开口于中鼻道。后组筛窦（posterior ethmoid sinus）开口于上鼻道。
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The result shows that CT can display the sub-group and the type of the anterior ethmoid sinus and its adjacent structures clearly.
表明CT扫描能充分显示前筛窦气房的气化变异及其邻近结构的影像学特征。
Objective: To explore anatomical variations of the anterior ethmoid sinus in Chinese people and to provide reference for clinical management.
目的：探讨国人前组筛窦的相关解剖变异，为临床手术提供参照数据和资料。
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