构建国人头颈三维有限元模型  

Creation of three-dimensional finite element model of human head and neck

作　　者：何黎民[1] 吴建国[2] 卢亦成[1] 丁祖泉[2] 陈学强[2] 王保华[2] 刘平[1] 

机构地区：[1]第二军医大学附属长征医院神经外科,上海200003 [2]上海同济大学生命科学与医学工程研究院

出　　处：《中华创伤杂志》2005年第3期196-199,共4页Chinese Journal of Trauma

基　　金：上海市科技发展基金资助项目(014119099)

摘　　要：目的　研究构建国人头颈三维有限元模型。　方法　依据正常国人头颅CT、MRI断层扫描图像,识别确定重建对象,对皮肤、颅骨采用灰度阈值法、轮廓跟踪算法及B样条曲线拟合法进行自动重建;对其他结构采用人机对话方式提取边界关键点,进行重建实体。定义结构材料参数后划分网格。筛选相邻体积交接面节点,粘连节点完成建模。　结果　完成包含皮肤、颅骨、硬膜、静脉窦、脑灰白质、脑干、小脑、脑室系统、颈椎及颈髓的国人头颈三维有限元模型。模型单元及节点数分别为 168 733, 80 535, 总质量约 5. 14kg。　结论　利用医学影像资料,采用轮廓跟踪算法等数字图像技术可半自动实现人颅脑复杂结构的三维重建。Objective To develop a three-dimensional (3D) finite element model of human head and neck. Methods Based on CT and MRI images, geometric characteristics of adult Chinese male human head were collected for a 3D reconstruction method of the human head and neck. The contour points of the scalp and skull were reconstructed in an automatic style by employing the digital image process technique. The B-spline function was used to fit each contour of image. The 3D shape of the human head was then obtained according to the contours fitted. The others were reconstructed in a man-machine conversation style, where the contours were artificially confirmed and the volumes were meshed with solid elements of finite element code. Results The 3D finite element model contains scalp, skull, dura mater, falx cerebri, tentorium, cerebrum (gray and white matter), cerebellum, brain stem, cerebral ventricles, cervical vertebra and spinal cord. The model consists of 168 733 elements and 80 535 nodes with a total mass of 5.14 kg. Conclusions Semi-automatic 3D reconstruction of sophisticated human head and neck model by employing digital image technique can semiautomatically come true in different kinds of patients based on medical imaging data.

关 键 词：头部 颈 有限元模型 三维 CT MRI 断层扫描图像 

分 类 号：R651[医药卫生—外科学]