Normal anatomy of aditus of antrum and antrum on high-resolution CT and three-dimensional reconstruction
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摘要: 目的:对正常人鼓窦入口及鼓窦不同方向的直径进行CT测量及三维重建,检测其正常值范围。并对年龄、性别及侧别这3个因素分类后分别进行比较。方法:随机选取90例无耳部病变受试者,行矢状面、横断面及冠状面高分辨率CT扫描,后期对扫描图像进行鼓窦入口、鼓窦三维重建,左右径、上下径及前后径测量和分组对照分析。结果:不同年龄段鼓窦入口CT三维重建构像较为恒定,而鼓窦则较为多样;鼓窦入口左右径平均值为(5.19±1.39)mm,上下径为(5.74±1.16) mm。鼓窦左右径平均值为(8.27±1.41)mm(＜6岁),(5.41±1.32)mm(≥6岁);上下径平均值为(11.78±1.65)mm(＜6岁),(9.91±2.04)mm(≥6岁);前后径平均值为(12.25±1.23)mm(＜6岁),(10.05±1.69)mm(≥6岁)。鼓窦入口左右径无年龄、性别和侧别差异(P＞0.05),鼓窦入口上下径存在性别差异,即男性鼓窦入口上下径大于女性(P＜0.05);鼓窦左右径、上下径及前后径均存在年龄间的差异(P＜0.05),但无性别、侧别间的差异(P＞0.05)。结论:正常人鼓窦入口影像学表现较为恒定,而鼓窦较为多样;不同性别鼓窦入口上下径存在显著性差异;不同年龄组间鼓窦左右径、上下径及前后径均存在显著性差异。Abstract: Objective: To study the normal anatomy of aditus of antrum and antrum on the high-resolution CT (HRCT) and the three-dimensional reconstruction, testing the normal range. And comparison was carried out according to the age, sex and side.Method: Ninety cases were randomly selected without ear lesions. Scanning were taken in sagittal, transverse and coronal planes on HRCT respectively. The structure of aditus and antrum was displayed by three-dimensional reconstruction. The left-right distances and up-down distances,antero-posterior distances were measured and analyzed.Result: The image of antrum varied with age, while aditus remained constant on the HRCT and the three-dimensional reconstruction. The average of left-right distance of aditus was(5.19±1.39)mm, and the average of up-down distance of aditus was(5.74±1.16)mm. The average of left-right distance of antrum was (8.27±1.41) mm (＜6 years old) and (5.41±1.32)mm (≥6 years old). The average of up-down distance of antrum was (11.78±1.65) mm (＜6 years old) and (9.91±2.04)mm(≥6 years old). The average of antero-posterior distance of antrum was(12.25±1.23) mm (＜6 years old) and (10.05±1.69) mm (≥6 years old). No statistically significant differences were seen in left-right distance of aditus by age, sex and side(P＞0.05). Significant differences in up-down distance of aditus was found between male and female, and the distance in male was greater than that in female(P＜0.05). Statistically significant differences were seen in left-right distance and up-down distance,antero-posterior distance of antrum by age(P＜0.05), but no statistically significant differences by sex or side(P＞0.05).Conclusion: Imaging of aditus ad antrum is relatively constant in the normal persons, while the aditus is more diverse. Significant gender differences were seen in up-down distance. There were significant differences in left-right distance, up-down distance, and antero-posterior distance of aditus among all age groups.
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Key words:
- sinus entrance /
- sinus tympani /
- three-dimensional reconstruction /
- normal value
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