利用CT扫描及CAD技术建立第3-7颈椎三维有限元模型  

Development of Three-dimensional Finite Element Model of Cervical Spine Form C_3-C_7 by Means of Computed Tomography Images and Compute Aided Design

作　　者：付裕[1] 阮狄克[2] 刘斌[1] 张沛[1] 李晨光[3] 

机构地区：[1]内蒙古医学院第二附属医院颈椎外科,内蒙古呼和浩特010030 [2]中国人民解放军海军总医院骨科,北京100037 [3]北京航空航天大学宇航学院,北京100083

出　　处：《内蒙古医学杂志》2005年第12期1073-1076,F0004,共5页Inner Mongolia Medical Journal

摘　　要：目的:探讨3-7颈椎有限元模型的建立,以期应用于临床实验研究。方法:通过CT扫描、Uni- graphics V18．0软件进行影像边界记录、定标等方法,按照点、线、面、体的顺序重建三维结构,采用CAD数据处理技术,输入相关的材料特性,构建3-7颈椎三维有限元模型。并通过有限元分析验证重建模型的有效性。结果:采用Unigraphics V18．0软件建立3-7颈椎的实体模型并划分单元,并分析了生理载荷下3- 7颈椎不同组成部分的应力分布。结论:为颈椎有限元模型的建立提供了一种简便、准确的方法,为分析和研究各种情况下生物力学表现创造了条件。Objective： To develop a detailed, three- dimensional, finite element model of a human cervical spine from C3 -C7 and validated against available experimental data for the biomechanical study of the cervical spine. Methods： Reconstructing the skeleton through CT scan, recording the edges of image, calibrating in sequence of point, curve area and volume. Mapped- mesh technique was used to obtain the finite element, adopt finite element commercial software package was used to study the response of the model. Results： The model of cervical spine from C3 - C7 was reconstructed and verified by finite element analysis and the stress distribution of the cervical spine from C3 - C7 was analysed under physical loading. Conclusion： The way in this study is a exact and simple one to establish the finite element model of the cervical spine from C3 - C7. It is possible to analyse and research the biomeehanieal behavior of the cervical spine in various case.

关 键 词：颈椎 螺旋CT 计算机辅助设计(CAD) 三维有限元模型 

分 类 号：R445.3[医药卫生—影像医学与核医学] R323.1[医药卫生—诊断学]