Finite-element method in electrical impedance tomography
Finite-element method in electrical impedance tomography
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DOI：
10.1007/bf02515311
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发表时间：
1994-09
影响因子：
3.2
通讯作者：
E. J. Woo;P. Hua;John G. Webster;Willis J. Tompkins
中科院分区：
文献类型：
--
作者：
E. J. Woo;P. Hua;John G. Webster;Willis J. Tompkins
在电阻抗断层扫描 (EIT) 中，将电流图案注入对象并测量边界电压以重建电阻率分布的横截面图像。静态 EIT 图像重建需要对象的计算机模型、有效的数据收集方法以及稳健且快速的重建算法。采用有限元方法作为计算机模型。本文描述了开发的有限元分析软件包，包括交互式图形网格生成器和使用稀疏矩阵和矢量技术求解线性方程组的快速算法。使用网格设计工具开发各种不规则形状主体的模型，包括使用 Delaunay 算法自动网格生成和优化。尽管该软件包是为电阻抗断层扫描定制的，但它也可以用于其他生物医学研究领域，例如阻抗心动图、心脏除颤和阻抗呼吸描记术。
In electrical impedance tomography (EIT), current patterns are injected into a subject and boundary voltages are measured to reconstruct a cross-sectional image of resistivity distribution. Static EIT image reconstruction requires a computer model of a subject, an efficient data-collection method and robust and fast reconstruction algorithms. The finite-element method is used as the computer model. The paper describes the finite-element analysis software package developed, including an interactive graphical mesh generator and fast algorithms for solving linear systems of equations using sparse-matrix and vector techniques. Various models of irregularly shaped subjects are developed using mesh-design tools, including automatic mesh generation and optimisation using the Delaunay algorithm. Even though the software package is customised for use in electrical impedance tomography, it can be used for other biomedical research areas, such as impedance cardiography, cardiac defibrillation and impedance pneumography.