摘要
目的:寻求更为快捷、精确的基于CT断层图像重建人体骨骼结构有限元几何模型建立方法。方法:利用Philips/Brilliance64排螺旋CT各向同性分辨率0.625mm的薄层扫描技术,基于0.4mm层厚118层人体寰枢椎的连续断层图像,Mimics直接读入Dicom格式原始图像,界定骨组织阈值后软件自动提取各层面轮廓线,每层图像经边缘分割、选择性编辑及补洞处理,去除冗余数据,三维化处理后获得寰枢椎骨骼三维几何模型,面网格可保存为后缀名.lis的ANSYS文件,能直接导入Ansys有限元分析软件生成三维有限元模型。结果:建立了更为精确、快捷的寰枢椎骨骼三维有限元几何模型,面网格可直接导入Ansys有限元软件,进一步行模型求解。结论:薄层CT扫描技术,Dicom标准的应用使有限元模型的建立更为精确,Mimics软件直接建立人体骨骼结构的有限元几何模型,极大程度提高了建模效率。
AIM： To find an easier and more precise method of reconstructing the human skeleton finite element model based on CT images. METHODS： Making use of 0.625-mm isotropous resolution thin layer scan technique of Philips/Brilliance 64 rows spiral CT and based on 0.4-mm-thick 118 layer of human body atlas and axis of CT continuous 2-dimensional pictures, we read in original Dicom format picture in the Mimics directly. After bone organization threshold was defined, each outline was withdrawn automatically, each edge of layer picture was partitioned, edited selectively and repaired by hole processing. After a redundancy data was cleaned, the atlas and axis skeleton 3D finite element geometry model was acquired. Then area mesh could be kept as the document ANSYS named .lis as the suffix and be introduced into Ansys software directly to establish 3D finite element model.
RESULTS： A 3D finite element model of atlas and axis was established, introducing area mesh into Ansys software directly to gain further solutions from the model.
CONCLUSION： The applications of thin layer CT scanning technique and the Dicom standard can make the establishment of digital model more accurate in the 3D finite element. And the Mimics software improves the efficient greatly in the establishment of human bones.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2007年第9期1620-1623,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
作者简介
傅栋，男，1972年生。浙江省绍兴市人。汉族。南方医科大学在读硕士．医师，主要从事脊柱外科研究。gdfudong@126．com
通讯作者：靳安民．教授。博士生导师。南方医科大学珠江医院骨科中心，广东省广州市510280
