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目的:探索准确测量和定位视神经管的影像学方法。方法:应用多层螺旋CT以骨质鼻尖-前床突为扫描基线对20具尸头标本行薄层扫描和解剖观察,验证影像学空间处理技术所测数据的准确性与视神经管立体定位实际符合率。结果:①骨质鼻尖-前床突扫描基线与视神经管走行基本一致;②影像学空间处理技术重建的视神经管定位标记线可全程显示在三维矢状位的鼻窦外侧壁上,与解剖观察情况一致;③眶口-鼻小柱距离、颅口-鼻小柱距离和视神经管内侧壁长度的解剖学和影像学测量值分别为(77.84±3.60)mm、(77.35±3.22)mm;(84.28±4.46)mm、(84.04±4.58)mm和(10.23±1.31)mm、(10.02±1.24)mm,两种测量值的差异无统计学意义(P>0.05)。结论:应用多层螺旋CT、骨质鼻尖-前床突扫描基线和空间处理技术能够准确对视神经管进行观测和空间定位。
Objective: To explore the imaging method of accurately measuring and locating optic canal. Methods: The multi-slice spiral CT was used to scan the 20 cadaver heads of the cadaver nose-anterior bed bump scanning and to observe the accuracy of the data measured by the imaging space processing technique and the stereotaxic position of the optic canal In line with the rate. Results: ① The base line of the nasal tip-anterior-extremity scan was basically the same as that of the optic canal. ② The optic canal tube localization marker line reconstructed by imaging technique could be displayed on the lateral wall of the paranasal sinus in the three-dimensional sagittal plane. (77.84 ± 3.60) mm, (77.35 ± 3.22) mm; (84.28), respectively; (3) The anatomical and radiographic measurements of orbital-columella distance, the distance of the cranio-columella and the length of the lateral wall of the optic canal were ± 4.46 mm, (84.04 ± 4.58) mm and (10.23 ± 1.31) mm and (10.02 ± 1.24) mm respectively. There was no significant difference between the two measurements (P> 0.05). Conclusion: MSCT can be accurately observed and spatially localized using multislice spiral computed tomography (MSCT), osseous nose-forebrain scanning baseline and spatial processing techniques.