FINITE-ELEMENT METHOD IN ELECTRICAL-IMPEDANCE TOMOGRAPHY

被引:46
作者
WOO, EJ
HUA, P
WEBSTER, JG
TOMPKINS, WJ
机构
[1] SIEMENS GAMMASON INC, APPL RES GRP, HOFFMAN ESTATES, IL 60195 USA
[2] UNIV WISCONSIN, DEPT ELECT & COMP ENGN, MADISON, WI 53706 USA
关键词
ELECTRICAL IMPEDANCE TOMOGRAPHY; FINITE-ELEMENT METHOD;
D O I
10.1007/BF02515311
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
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 the use in electrical impedance tomography, it can be used for other biomedical research areas, such as impedance cardiography, cardiac defibrillation and impedance pneumography.
引用
收藏
页码:530 / 536
页数:7
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