以有限元分析为目标的Mimics颈椎建模的新思路  

New way of 3D reconstruction of cervical vertebrae aiming at finite element analysis in Mimics

作　　者：樊继宏[1] 钟世镇[1] 焦培峰[1] 邬黎平[1] 张美超[1] 赵卫东[1] 李鉴轶[1] 

机构地区：[1]南方医科大学解剖学教研室广东省医学生物力学重点实验室,广州510515

出　　处：《中国临床解剖学杂志》2011年第2期222-224,共3页Chinese Journal of Clinical Anatomy

基　　金：广州市科技计划项目(2007Z1-E0081);卫生部卫生行业科研专项项目(200802017)

摘　　要：目的研究以有限元分析为目标的使用Mimics软件三维重建颈椎的方法。方法导入CT断层图像到Mimics软件,选取合适的灰度阈值,确定仅含C3~6四个颈椎整体的断层图像,使用单象素编辑擦除工具区分相邻椎骨的间隙,采用三维重建命令建立各个颈椎模型。结果 C3~6三维模型中椎体和椎体之间的间隙呈现出前后低、中间高的特征,两两相邻椎骨的关节突间隙为一个象素甚至为零,4个颈椎三角片数量为78 300,节点数量为39 133,所获得颈椎C3~6模型边界清晰、关节突间距微小适合进行有限元网格划分和分析。结论在Mimics中先包含整体然后区分相邻颈椎边界的方法所建立的颈椎模型其边界清晰且间距微小,适合进行有限元网格划分和分析。Objective To explore the new 3D reconstruction aiming at FEA（Finite Element Analysis） in Mimics.Methods Importing CT images into Mimics software,selecting adequate ＂Thresholding＂,reserving holistic CT images of C3~6,distinguishing spaces of adjacent cervical vertebrae by single pels（picture element） erase Circle tool of Edit Masks,and adopting ＂Calculate 3D＂tool to reconstruct C3~6 models were performed one by one.Results The front and rear spaces of vertebral body between adjacent vertebrae wee smaller than that of the middle.The articular process spaces between adjacent vertebrae showed rather low pels（one or zero）.The amount of triangular plates of four cervical vertebrae was about 78300,and that of the nodes was 39133.Spaces of adjacent 3D models of C3~6 were sharp and tiny,which was valuable to be used in grids partitioning and analysis FEM（Finite Element Method）.Conclusions It is an effective method to exert grids partitioning and analysis FEM,by reserving holistic CT images of C3~6 and distinguishing spaces of adjacent cervical vertebrae though single pels（picture element） erase Circle tool of Edit Masks.

关 键 词：有限元分析 颈椎 三维重建 MIMICS 

分 类 号：R322.3[医药卫生—人体解剖和组织胚胎学]