电阻抗成像技术的原理及其发展

介绍了一种新的图像重建技术--电阻抗成像(EIT)技术.它根据物体内部不同物质的导电参数(如电阻率、电容率)的不同,通过对物体表面电流、电压的施加及测量来获知物体内部导电参数的分布,进而重建出反映物体内部结构的图像.作为一个数学物理反问题,EIT技术具有其本身的特点和难点,因而目前还处于探索性研究阶段.本文在EIT数学物理模型基础上对整个EIT技术作了较为全面的介绍,包括理论原理、技术上的难点、系统分析、以及目前国际国内的研究现况和研究方向.通过对ACT3的介绍,对EIT系统的具体实现也做了简要分析.

Theory and Development of Electrical Impedance Tomography Technology

Electrical Impedance Tomography(EIT) is a new technique that forms images of electric resistivity or conductivity within the body through measuring the current or the voltage of the surface. As a mathematical physics inverse problem,EIT is a developing technique on its own feature and difficulty.This paper gives an introduction of the EIT technology in details.It includes the primary theory,technical difficulty,system analysis as well as the recent research background and trend all over the world.It introduces ACT3 to give a simple analysis realizing the EIT system.