基于全电极模式的三维电阻抗成像有限元法的算法实现

The Algorithm Implementation of 3D-EIT based on CEM using FEM

三维电阻抗成像(3D-EIT)技术是当今生物医学工程领域一项全新的研究课题,其中有限元法在EIT中的实现是EIT成像的基础。本文把有限元法用于3D-EIT中,利用全电极模式(CEM)详细推导了单元矩阵和总体矩阵,建立了相应的三维EIT有限元网格模型,并在计算机上运用Matlab7.0软件得以全部实现。

3D Electrical Impedance Tomography （3D-EIT） technology is one of the hottest study topics in biomedical engineering, in which the implementation of Finite Element Method （FEM） is the foundations of EIT image reconstruction. In this paper, using FEM in EIT, the formation of the element and the general matrix based on Complete Electrode Model （CEM） was deduced in detail. A 3D-FEM mesh model was established for 3D-EIT researches and implemented on computer with Matlab7.0.