腰椎横突Mimics测量与DR测量差异性研究

A study on the difference between the measurement of transverse process width by Mimics and DR

目的对比分析Mimics三维成像和DR两种方法测量腰椎横突的差异。方法抽取15例患者的腰椎CT资料,分别用Mimics三维重建和DR对腰椎横突的宽度及横突末端距离进行测量,通过对比两种方法测量数据,了解Mimics测量与DR测量的差异。结果 DR测量值与Mimics测量值比较差异有统计学意义(P<0.05),横突宽度87%DR测量值大于Mimics三维重建测量值;横突末端距离99%DR测量值大于Mimics三维重建测量值。结论横突宽度和横突末端距离DR的测量值大于Mimics测量值,DR测量偏大的原因与摄影时的肢片距和物片距有关,而横突的三维角度可影响DR的放大比例。

Objective To compare and analyze the differences on measuring the lumbar transverse process by using mimics 3D imaging and by using DR.Methods The CT data of lumbar vertebrae of 15 patients were analyzed,and the width of the transverse process of the lumbar vertebrae together with the distance of the transverse process were measured by both mimics 3D imaging and DR.The data collected these two methods were compared to elucidate the difference.Results The difference between DR measurement and Mimics measurement was statistically significant(P<0.05).The width of 87% of the transverse process was higher than that of mimics 3D imaging.The distance of 99% of the distance of the transverse process was higher than that of mimics 3D imaging.Conclusion The width of the transverse process and the distance of the transverse process measured by DR are larger than by mimics 3D imaging.It is probably due to the reason that DR measurement is more susceptible to the distance between limb and object,besides mimics 3D angle of the transverse process could affect the magnification ratio of DR.