Correcting for variability in mesh geometry in finite element models

Correcting for variability in mesh geometry in finite element models
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修正有限元模型中网格几何形状的变化

DOI:
10.1088/1742-6596/224/1/012021
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发表时间:
2010
期刊:
Conference Series
影响因子:
--
通讯作者:
Adler A
Adler A
中科院分区:
--
文献类型:
--
作者:
Adler A

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我们表明,EIT正演模型中有限元模型(FEM)几何形状的变化可能导致重建图像中的图像伪影。我们解释这些文物的各向异性电导率张量到FEM系统矩阵的投影的变化的结果。这将各向异性分量引入到模拟电压中,其不能被重建到各向同性图像上,并且表现为伪影。为了解决这个问题,我们表明,它是可以将一个有限元顶点移动组件到反问题的制定。这些结果表明,在EIT图像重建的公式化中考虑由于FE网格几何形状引起的伪影可能是重要的。
We show that variability in the finite element model (FEM) geometry in the EIT forward model can result in image artefacts in the reconstructed images. We explain these artefacts as the result of changes in the projection of the anisotropic conductivity tensor onto the FEM system matrix. This introduces anisotropic components into the simulated voltages, which cannot be reconstructed onto an isotropic image, and appear as artefacts. In order to address this problem, we show that it is possible to incorporate a FEM vertex movement component into the formulation of the inverse problem. These results suggest that it may be important to consider artefacts due to FE mesh geometry in the formulation of EIT image reconstruction.
电阻抗断层扫描 (EIT) 形状变化的定量分析
DOI: 10.1007/978-3-540-73841-1_110
发表时间: 2007
影响因子: 3.2
作者:
Sungho Oh;T. Tang;R. Sadleir
通讯作者: R. Sadleir