目的:测量正常人面神经管膝状窝的相关径线并建立正常值范围,为面神经管膝状窝扩大提供客观诊断依据.资料与方法:收集100耳正常颞骨CT图像,经多平面重组(MPR)得到特定方位的四幅图像Ⅰ～Ⅳ,计算图Ⅲ、Ⅳ的MPR成功率;在图Ⅰ～Ⅳ中设计测量面神经管膝状窝的5种径线A～E,记录数据并按照不同年龄、性别、侧别分组,统计分析不同年龄、不同性别、不同侧别之间各径线有无差异,估算面神经管膝状窝各径线的95％正常值范围.结果:本组100耳正常人中图Ⅲ、Ⅳ的MPR成功率为96％、97％.正常人面神经管膝状窝各径线之间有年龄差异,不同性别及侧别间无差异.青春期后正常人膝状窝各径线95％正常值范围:径线A:2.81～2.95 mm,径线B:3.23～3.35 mm,径线C:1.59～1.67 mm,径线D:1.62～1.71 mm,径线E:3.20～3.33 mm.结论:本研究设计测量了面神经管膝状窝5个相关径线,并建立正常值范围,为面神经管膝状窝扩大的诊断提供客观依据.%Objective: The measure the related diameters of geniculate fossa of facial nerve canal in normal subject and to establish the normal value range to provide an objective basis for the diagnosis of the geniculate fossa enlargement. Materials and Methods: One hundred CT examinations of normal temporal bone were collected. Four kinds of special orientation imagings(image I -IV) were obtained using mutiplanar reformation(MPR). The achievement ratio of MPR in image HI, IV were calculated. Five kinds of lines were designed to measure the geniculate fossa namely A, B, C, D, E. Data were recorded in accordance with the different age, sex and side group. Statistical analysis was done to analyze difference between the group of different age, sex and side. The 95% range of normal value of the diameters were estimated. Results: Achievement ratio of MPR for image HI and IV were 96% and 97%; All diameters of geniculate fossa had difference in different age group, but had no difference in different sex and side group. The 95% range of normal value of geniculate fossa diameters were as follows: A: 2.81～2.95 mm, B: 3.23～3.35 mm, C: 1.59～1.67 mm, D: 1.62～1.71 mm, E: 3.20-3.33 mm. Conclusions: The present study was designed to measure 5 related diameters and to establish the normal value range of geniculate fossa. It provides an objective basis for the diagnosis of the geniculate fossa enlargement.
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