国人胫骨长度的三维测量方法及意义

The 3D Measurement of Chinese Tibia Length and the Clinical Significance

目的:通过医学工程学软件对国人胫骨进行三维重建,并进行解剖参数测量,积累国人胫骨人类学资料并探讨其临床意义。方法:收集2013年3月到2014年5月期间在解放军总医院进行下肢动脉造影CT扫描的199例患者数据。通过Mimics软件的阈值分割、区域增长、蒙版编辑等功能重建胫骨三维模型,通过3-matic对重建模型进行标准位置纠正后标记胫骨最近端和最远端端点,并记录其Z轴坐标值,通过SPSS软件对相关参数进行统计学分析。结果:胫骨平均长度为(358±22)mm(295-431mm),左侧胫骨长度为(358±22)mm(296-424mm),右侧胫骨长度为(358±22)mm(295-431mm);男性胫骨长度为(365±19)mm(323-431mm),女性胫骨长度为(342±18)mm(295-397mm)(P=0.000)。胫骨长度与身高成显著的正相关(r=0.84,P=0.000),胫骨长度(mm)为因变量,身高(m)为自变量,其回归方程为Y=242X-45(P=0.000)。应用协方差分析在排除身高因素影响后,比较性别因素对于胫骨长度的影响,男女两组胫骨长度差异有统计学意义(P=0.006)。结论:通过工程学软件对胫骨长度的三维测量方法精确有效,且操作简单,利于完成,对指导临床有重要作用。

Objective： To accumulate tibia anthropological data of Chinese and explore its clinical significance through Mimics and 3-matic. Methods： Collected the DICOM format data of CT imagine of 199 patients in our hospital. The 3-D model of tibia was reconstructed in Mimics. Then we rotated the tibia model to the standard position in 3-matic software. Statistical analysis was performed by SPSS V.17.0. Results： The mean length of tibia in right sides and left was（358±22）mm samely. The correlation coefficient between tibia length and height was calculated（r=0.84,P=0.000）. Simple regression equation for tibia length and height was also obtained. Excluding the height factor to compare the effects of gender factor on tibia length,Covariance analysis showed two groups of men and women tibia length was statistically significant difference（P=0.006）. Conclusion： Using Mimics and 3-matic to measure the tibia length is more of precision,easy to operate,and has significant effect to clinical guidance.