对１００例无明显鼻部疾病的成人行鼻腔、鼻窦冠状位ＣＴ扫描，从不同层面观测鼻腔、鼻窦重要解剖结构的值限范围和形态。结果是：高台型筛板与筛顶间的平均高度差为５．１７ｍｍ，筛泡宽度为１１．１５ｍｍ，中鼻甲的宽度为５．４０ｍｍ；Ｈａｌｌｅｒ气房的出现率为１４．０％，中鼻甲气化为１４．０％，Ｏｎｏｄｉ气房的出现率为８．５％。并就这些观测对内窥镜鼻窦手术的指导意义进行讨论。 Nasal cavity and paranasal sinus CT scan of 100 cases of adults without obvious nasal diseases were performed. The range and shape of important anatomic structures of nasal cavity and paranasal sinuses were observed from different aspects. The results are: the average height difference between plateau sieve and sieve top is 5.17mm, the sieve width is 11.15mm, the width of middle turbinate is 5.40mm; Haller chamber is 14.0% Turbinate gasification was 14.0%, Onodi air room was 8.5%. The significance of these observations in the guidance of endoscopic sinus surgery is discussed.