论文部分内容阅读
目的探讨基于三维重建技术及有限元分析的测量骨密度的方法。方法以1具脊柱标本(C3～L5)进行高速CT薄层扫描,在Mimics中进行每个椎体的三维重建,在Ansys中进行体网格划分,在Mimics中赋予10、400种材料属性,输出至Ansys计算骨骼中每一种材料属性的体单元的体积,根据CT扫描的Hu值与骨密度的经验公式,计算标本质量及密度,对照组以电子天平测量(C3～L5)的质量。进行统计学处理。结果(1)对照组、10种及400种材料属性组C3～L5的密度值分别为0.62±0.09、0.5813±0.0806、0.5813±0.0805g/cm3;(2)单因素方差分析:对照组与赋予10、400种材料属性各试验组比较的P值均大于0.1,试验组组别之间P=0.997。结论(1)本试验方法可定量测量骨骼密度及其密质骨及松质骨密度值;(2)赋予骨骼10种材料属性即可达到测量要求;(3)本试验为骨密度与有限元分析的统一作初步准备。
Objective To investigate the method of bone mineral density measurement based on three-dimensional reconstruction and finite element analysis. Methods High-speed CT thin-layer scanning was performed with one spine specimen (C3 ~ L5). Three-dimensional reconstruction of each vertebra was performed in Mimics. Body meshes were performed in Ansys. Ten, 400 material properties were assigned in Mimics. And output to Ansys to calculate the volume of the body unit for each material property in bone. The mass and density of the specimen were calculated according to the empirical formula of Hu value and bone density of CT scan, and the quality of the control group was measured by electronic balance (C3 ~ L5). Statistical analysis. Results (1) The density of C3 ~ L5 in control group, 10 kinds and 400 kinds of materials were 0.62 ± 0.09,0.5813 ± 0.0806,0.5813 ± 0.0805g / cm3, respectively. (2) One-way ANOVA: P value of 10,400 material properties in each test group was greater than 0.1, P = 0.997 in the test group. Conclusions (1) The test method can quantitatively measure the bone density and the density of dense bone and cancellous bone; (2) Assign 10 kinds of material properties of the bone to meet the measurement requirements; (3) The test for the bone mineral density and finite element Analysis of the unity of the initial preparation.