Grosland Nicole M, Bafna Ritesh, Magnotta Vincent A
Department of Biomedical Engineering, The University of Iowa, Iowa City, IA, USA.
Comput Methods Biomech Biomed Engin. 2009 Feb;12(1):35-43. doi: 10.1080/10255840903065134.
This work introduces a novel method of automating the process of patient-specific finite element (FE) model development using a mapped mesh technique. The objective is to map a predefined mesh (template) of high quality directly onto a new bony surface (target) definition, thereby yielding a similar mesh with minimal user interaction. To bring the template mesh into correspondence with the target surface, a deformable registration technique based on the FE method has been adopted. The procedure has been made hierarchical allowing several levels of mesh refinement to be used, thus reducing the time required to achieve a solution. Our initial efforts have focused on the phalanx bones of the human hand. Mesh quality metrics, such as element volume and distortion were evaluated. Furthermore, the distance between the target surface and the final mapped mesh were measured. The results have satisfactorily proven the applicability of the proposed method.
这项工作介绍了一种使用映射网格技术自动进行患者特异性有限元（FE）模型开发过程的新方法。目标是将高质量的预定义网格（模板）直接映射到新的骨表面（目标）定义上，从而以最少的用户交互生成类似的网格。为了使模板网格与目标表面对应，采用了基于有限元方法的可变形配准技术。该过程已分层进行，允许使用多个层次的网格细化，从而减少获得解决方案所需的时间。我们最初的工作集中在人类手部的指骨上。评估了网格质量指标，如单元体积和畸变。此外，还测量了目标表面与最终映射网格之间的距离。结果令人满意地证明了所提方法的适用性。
