Automated generation of a finite element stent model
Automated generation of a finite element stent model
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DOI：
10.1007/s11517-008-0410-3
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发表时间：
2008-11-01
影响因子：
3.2
通讯作者：
Verhegghe, Benedict
中科院分区：
文献类型：
--
作者：
Mortier, Peter;De Beule, Matthieu;Verhegghe, Benedict
数值模拟已被证明是研究支架力学行为的有价值的工具。这些计算机模型需要大量的预处理和计算工作，因此需要不断进行精确的简化和自动化。例如，最近表明，使用梁元素而不是固体元素导致支架模拟的速度显著提高。然而，目前应用的从支架样品开始创建有限元网格的技术仍然是耗时的。我们提出了一种半自动化的策略，以获得一个准确的有限元梁网格支架样品。该方法包括两个步骤：（1）从显微CT图像中获得支架几何形状的三角形表面表示。（2）然后，通过计算中心线自动生成梁网格。该方法具有时效性，可生成准确的3D支架模型，如MULTI-LINK Vision（TM）支架所示。
Numerical simulations have proven to be a valuable tool to investigate the mechanical behavior of stents. These computer models require a considerable amount of preprocessing and computational effort and consequently there is a continuous need for accurate simplifications and automation. For example, it was recently shown that using beam elements instead of solid elements results in a significant speed up of stent simulations. However, the currently applied techniques to create a finite element mesh starting from stent samples remain time-consuming. We present a semi-automated strategy to obtain an accurate finite element beam mesh from a stent sample. The method consists of two steps: ( 1) A triangulated surface representation of the stent geometry is obtained from micro CT images. ( 2) Subsequently, a beam mesh is automatically generated by computing the centerline. The method is time-effective and results in an accurate 3D stent model as demonstrated for the MULTI-LINK Vision(TM) stent.