电磁层析成像系统

Electromagnetic tomography system

为了研制新型电磁层析成像(EMT)系统,提高EMT系统图像重建质量,通过对多种电磁层析成像系统的比较,尤其分析了两种典型电磁层析成像系统:单线圈激励系统和平行场激励系统的结构特点和发展过程,根据传统EMT系统的基本结构和物理原理,给出了典型EMT系统的数学模型;归纳了电磁层析成像技术中常用图像重建算法:线性反投影算法、启发式图像重建算法、ART算法和相关算法的优缺点;总结了EMT系统传感器阵列的设计特点、优于其他电层析成像系统的特点以及当前在开发中遇到的困难,对于电磁层析成像技术的发展具有指导意义,为新型系统的研制提供了理论依据。

In order to design a new electromagnetic tomography system（EMT） and raise the quality of image reconstruction, a general overview of EMT is given. Many EMT systems are discussed, especially single coil exciting system and parallel field exciting system. Their structure features and development are discussed. Basic structure and physical principles are summarized. Mathematic model is given. Heuristic algorithm, algebraic reconstruction algorithm and correlation algorithm for image reconstruction are presented. Structural characteristic of EMT system, the difficulty in development are summarized, which has guiding significance for developing EMT system.