Liu W P, Hua P, Webster J G
Department of Electrical and Computer Engineering, University of Wisconsin-Madison 53706.
Clin Phys Physiol Meas. 1988;9 Suppl A:131-5. doi: 10.1088/0143-0815/9/4a/022.
We have developed a three-dimensional, computer-simulated, electrical impedance tomographic imaging system using the four-electrode measurement technique. The reconstruction process finds the numerical solution of Laplace's equation by using the finite element method and the Newton-Raphson algorithm. A new diagonal electrodes measurement method provides lower error than the usual neighbouring electrodes measurement method. For a three-layer, 4 x 4 model, the number of iterations increased from 3 to 16 as the number of randomly placed, high-resistivity voxels increased from 3 to 18.
我们利用四电极测量技术开发了一种三维计算机模拟电阻抗断层成像系统。重建过程通过使用有限元方法和牛顿-拉夫逊算法来找到拉普拉斯方程的数值解。一种新的对角电极测量方法比通常的相邻电极测量方法具有更低的误差。对于一个三层4×4模型，随着随机放置的高电阻率体素数量从3增加到18，迭代次数从3增加到16。
