基于影像特征的脊椎有限元模型研究  

Approach to Finite Element Model from Spine CT and MRI Image

作　　者：王筝[1] 李海云[1] 

机构地区：[1]首都医科大学生物医学工程学院,北京100069

出　　处：《计算机工程与应用》2006年第32期211-213,219,共4页Computer Engineering and Applications

基　　金：北京市优秀人才资助基金;留学回国人员资助基金联合资助。

摘　　要：融合腰椎的CT、MRI的影像解剖结构特征,应用图像分割及三维重建算法建立了精确的腰椎几何模型。在几何模型的基础上建立L1-L2的腰椎段的有限元模型。应用有限元计算方法研究了腰椎段的应力应变分布规律。构建的模型具有比较精确的解剖结构,能够较好地揭示在体腰椎段的应力应变变化特征。该模型为腰椎段的手术图像指导和仿真奠定了理论基础。Combining the CT and MRI data-based anatomical structure of spine,a three-dimensional accurate geometric model of the lumber is constructed by using the algorithms of image segmentation and 3-D reconstrution.Based on the geometric model,a three-dimensional Finite Element Modeling（FEM） of L1-L2 segment has been created.We have studied the stress and stain distribution of lumbar using FEM.The model has accurate anatomic structure,and can reflect the characteristic of the change on the stress and strain on lumbar in vitro.The model provides the foundation for the spine surgery simulation and image guide surgery.

关 键 词：腰椎 图像重建 有限元 应力应变 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]