摘要/Abstract

摘要： 目的 ·借助 CT重建技术研究中颅窝入路内听道的解剖定位。方法 ·选取 44例（88侧）正常颞骨 CT数据，其中男女各 22例，通过 CT重建技术重建中颅窝三维解剖结构，测量内听道与相关解剖结构之间的成角和距离，并统计分析不同性别及不同侧别之间有无差异。结果 ·在中颅底的三维重建模型中，弓状隆起的发现率为 43%。岩浅大神经与内听道成角为 51.46.±9.28.，上半规管与内听道成角为 49.22.±7.32.，内听道上方骨质厚度为（ 4.38±0.97）mm。各项数据均不存在性别和侧别差异。结论 ·内听道与相关解剖结构之间的成角和距离存在显著的个体差异，CT重建技术有助于内听道的个体化精准定位。
关键词: 内听道, 中颅窝入路, 颅底解剖, 计算机断层扫描
Abstract:
Objective · To study how to localize the internal auditory canal in the middle cranial fossa approach in Chinese using CT reconstruction technique. Methods · Forty-four cases (88 sides) of normal temporal bone CT data were selected, including 22 males and 22 females. The anatomical structures of the middle cranial fossa including the skull base, the internal auditory canal and the superior semicircular canal were reconstructed in 3D. The angle between great superficial petrosal nerve and internal auditory canal, the angle between superior semicircular canal and internal auditory canal and the osseous thickness above internal auditory canal were measured. The angle and distance were statistically analyzed in different sex and side groups. Results · On the reconstructed 3D middle cranial base, the arcuate eminence could only be identified in 43% cases. The angle between great superficial petrosal nerve and internal auditory canal was 51.46.±9.28.; the angle between superior semicircular canal and internal auditory canal was 49.22.±7.32.; the osseous thickness above internal auditory canal was (4.38±0.97) mm. No gender or side difference was noticed. Conclusion · There are significant individual differences in angulation and distance between the internal auditory canal and its related anatomical structures. CT reconstruction technique is helpful for accurate localization of the internal auditory canal.
Key words: internal auditory canal, middle cranial fossa approach, skull base anatomy, computed tomography


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