MSCT后处理技术在眶骨正常解剖中的应用

Post-processing techniques of multi-slice spiral CT in normal orbital related structures

目的:探讨多层螺旋CT后处理技术在眶骨正常相关结构中的应用价值。方法:收集207例正常眶骨被检者的多层螺旋CT图像,对所得图像进行MPR,CPR,VRT后处理,对某些结构常规显示断面和标准化断面的显示结果进行统计学分析。结果:重组后的标准化图像能清晰显示眶骨相关结构的左右对称情况。标准化图像对颧额缝、颧骨管、眶下管、眶上切迹及视神经管的对称性显示明显优于常规扫描图像(P<0.01);而对颧蝶缝的显示无明显差异(P>0.05)。结论:①利用多层螺旋CT各向同性扫描进行后处理在避免摆位困难的同时,减少了患者的辐射剂量;②多层螺旋CT各向同性扫描结合多种后处理技术能够很好地对称显示眼眶相关结构。

Objective：To explore the value of post-processing techniques of multi-slice spiral CT（MSCT） in normal orbital related structures.Methods：207cases with the source images of normal orbit were retrospectively reviewed and processed using multiple planar reformation（MPR）,curved planar reformation（CPR）,volume rendering technique（VRT）.The show results of conventional and reconstructed sections were statistically analysed.Results：The orbital related structures can be display symmetrically by the standard section.The display rate of sutura nygomaticofrontalis,the canal of temporal bone,infraorbital canal,supraorbital notch and optic canal in the standard section was significantly higher than in conventional images（P〈0.05）.There was no difference in the display rate of the sutura zygomaticosphenoidalis（P〈0.05）.Conclusion：① The post-processing of multi-slice CT isotropic scanning can reduce the radiation dose and avoid the difficulty in positioning patient;② The orbital related structures can be display very well after post processing with multi-slice CT isotropic scanning by using the post-processing techniques.