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目的:探讨基于10 μm级耳科专用CT的正常前庭神经管影像解剖特征。方法:回顾性收集2020年9月至2021年3月于首都医科大学附属北京友谊医院放射科接受10 μm级耳科专用CT检查的67例（103侧）患者的资料，其中男24例，女43例，年龄18~70（40±17）岁。据前庭下神经管形态分为4型：均匀直管状、弯曲管状、壶腹状及直接连接。分析比较不同侧别、性别及形态间前庭上神经管指标（外口、峡部及内口宽径、神经管长度、与面神经迷路段的夹角）及前庭下神经管指标（外口及内口宽径、神经管长度、与前庭长轴及蜗轴的夹角）的差异。结果:10 μm级耳科专用CT对前庭上神经管清晰显示率为100%（103/103），对前庭下神经管清晰显示率为75.7%（78/103）。左侧前庭上神经管内口较右侧显著增宽［（1.46±0.47）mm比（1.31±0.41）mm］、前庭下神经管与蜗轴夹角显著减小［（41.6±16.9）°比（51.6±21.0）°］（均n P<0.05）。男性前庭上神经管内口较女性显著增宽［（1.55±0.37）mm比（1.28±0.36）mm］（n P<0.05）。均匀直管状前庭下神经管最常见（62.1%，64/103），其次为直接连接（19.4%，20/103），壶腹状最少见（4.9%，5/103）。不同形态前庭下神经管的外口宽径、与前庭长轴及蜗轴夹角的差异有统计学意义（均n P<0.05）。n 结论:10 μm级耳科专用CT可清晰显示正常前庭神经管，对正常前庭神经管的定量测量可为该区病变的影像诊断及术前评估提供参考依据。“,”Objective:To analysis the anatomical features of normal vestibular nerve canal based on 10 μm otology CT.Methods:Sixty-seven patients (103 ears) underwent 10 μm otology CT examinations in Department of Radiology, Beijing Friendship Hospital, Capital Medical University from September 2020 to March 2021 were retrospectively recruited. There were 24 males and 43 females, aged from 18 to 70 (40±17) years. According to the morphology of the inferior vestibular nerve canal, it can be divided into four types as follows: uniform straight type, curved type, ampullary type and direct connection. The anatomical variables of the superior vestibular nerve canal (external orifice, isthmus and internal orifice widths, canal length, angle with labyrinthine segment of the facial nerve) and inferior vestibular nerve canal (widths of the externaland internal orifice, canal length, angles with long axis of the vestibule and the modiolus) between the different sides, genders and canal morphologies were analyzed and compared, respectively.Results:100% superior vestibular nerve canals and 75.7% (78/103) inferior vestibular nerve canals are clearly depicted by otology CT. The left-side ear presented with larger internal orifice diameter of the superior vestibular neve canal [(1.46±0.47) mm vs (1.31±0.41) mm], and a smaller angle between the inferior vestibular neve canal and the modiolus [(41.6±16.9)° vs (51.6±21.0)°] than the right-side ear (alln P<0.05, respectively), respectively. Compared to females, males demonstrated larger internal orifice of the superior vestibular nerve canal [(1.55±0.37) mm vs (1.28±0.36) mm,n P<0.05]. The uniform straight type of the inferior vestibular nerve canal was the most common type (62.1%, 64/103), followed by the direct connection (19.4%, 20/103), and the ampullary type was the least common type (4.9%, 5/103). There were significant differences in external diameter and angles with the long axis of the vestibule and the modiolus between the four morphologies of the superior vestibular nerve canal (alln P<0.05, respectively).n Conclusion:Ten μm otology CT is capable of depicting normal vestibular nerve canal clearly. Quantitative measurement of the normal vestibular nerve canal can provide references for the imaging diagnosis and preoperative evaluation of lesions in this area.