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目的探讨多向调整多平面重组(MPR)及曲面重组(CPR)全程显示后鼔索神经小管的方法。方法对76例(106耳)正常颞骨行高分辨率CT各向同性扫描,再做多向调整MPR及CPR,以显示后鼔索神经小管并进行测量。结果MPR及CPR的后鼔索神经小管显示率均为96.2%,但以后者图像为佳。有4耳经反复多次MPR及CPR均未能观察到后鼔索神经小管。1耳可见2支后鼔索神经小管在不同平面自乳突段分出,后又合并成单一的后鼔索神经小管。在轴面像上,后鼔索神经小管汇入处位于面神经管前外侧、外侧、后外侧及前方的分别为48.1%、45.1%、3.9%及2.9%。汇入处距茎乳孔距离为(2.93±2.72)mm。后鼔索神经小管与面神经管的夹角为36.10°±15.44°。显示后鼔索神经小管的MPR重组基线的轴位及冠状位旋转角度,右耳分别为顺时针18.66°±7.86°及逆时针10.60°±6.15°,左耳分别为逆时针17.75°±6.47°及顺时针11.54°±6.41°。后鼔索神经小管长度及内径分别为(9.34±2.51)mm及(0.41±0.07)mm。结论多向调整MPR及CPR可全程显示后鼔索神经小管,是研究后鼔索神经小管解剖的重要方法。
Objective To investigate the method of retrieving neural tubes after multiple display of multiplanar reconstruction (MPR) and surface reconstruction (CPR). Methods Totally 76 cases (106 ears) of normal temporal bone were scanned by high resolution CT, and multi-directional MPR and CPR were performed to show the post-traumatic nerve tubules and measured. Results MPR and CPR post-traumatic neural tube display rate was 96.2%, but the latter image is better. There are 4 ear repeatedly repeated MPR and CPR failed to observe the cable after trawling. 1 ear can be seen 2 after the cable retrieval cable in different planes from the mastoid segment, and then merged into a single post-traumatic neural tube. In the axial images, posterior urethral canal entrance located 48.1%, 45.1%, 3.9% and 2.9% of the anterolateral, posterolateral and anteromedial segments, respectively. The distance from the stem milk hole at the entrance was (2.93 ± 2.72) mm. After the cable and the facial nerve canal tracheal angle of 36.10 ° ± 15.44 °. Axis and coronal rotation angles of post-traumatic proximal tubule MPR baseline were shown with right ear at 18.66 ° ± 7.86 ° clockwise and 10.60 ° ± 6.15 ° counterclockwise, respectively, and left ear at 17.75 ° ± 6.47 ° counterclockwise And clockwise 11.54 ° ± 6.41 °. The length and diameter of the tracheal tubules were (9.34 ± 2.51) mm and (0.41 ± 0.07) mm, respectively. Conclusions Multi-directional adjustment of MPR and CPR can be used to visualize the tracheal tubules. This is an important method for tracing neural tube trabeculae after study.