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基于CPD和RBF算法生成具有详细的人类几何特征的骨FEM的快速方法

Qiuqi Yuan¹, Binhui Jiang², Xiaoming Zhu³

¹State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, People's Republic of China.

Scientific reports

|May 31, 2023

概括

一种新方法快速创建详细的人类骨有限元素模型 (FEM) 使用连贯点漂移 (CPD) 和辐射基函数 (RBF). 这大大加快了交通事故研究解剖模型的开发速度.

科学领域:

生物力学生物力学
计算建模计算建模
医学成像医学成像

背景情况:

开发具有详细解剖特征的人体有限元模型 (FEM) 对于理解交通事故伤害机制至关重要.
传统的FEM开发是复杂和耗时的,尤其是网格化过程.

研究的目的:

提出一种新的,快速的方法来快速开发具有详细解剖特征的人类骨FEM.
为了提高FEM产生的网格变形的准确性和速度.

主要方法:

开发了一种结合自动特征点生成的连贯点漂移 (CPD) 和用于网格变形的辐射基函数 (RBF) 的新方法.
基于RBF的网格变形从目标计算机断层扫描 (CT) 数据生成了FEM网格.
通过CPD算法的点云注册,快速生成必要的几何特征点来进行网状变形.

主要成果:

在大约2.7秒内生成了一个3岁的胸FEM,包含27,728个元素 (3-5毫米的网格大小).
生成的FEM和目标几何形状之间的平均误差约为2.7毫米.
新的FEM准确地代表了详细的解剖特征,其网状质量与源代FEM相美.

结论:

拟议的基于CPD和RBF的方法允许快速准确地开发解剖学详细的人类骨FEM.
这种方法大大减少了与传统FEM生成相关的时间和复杂性.
生成的FEM适用于对交通事故中受伤机制的详细分析.

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