电阻抗成像中有限元后处理的实现

电阻抗成像研究中，每次计算结果都将产生大量的数据(如电导率、电阻率分布)，这些数据的规律很不直观，不便理解。怎样直接从图形上直观地看出电导率、电阻率分布，对计算结果的分析、理解有着重要的作用，特别是有助于医务人员的理解。文中主要从等值线及色彩图的绘制两个方面讲述了电阻抗成像中有限元后处理的实现，并用Visual C ．NET及OpenGL编写了有限元后处理软件，很好地解决了有限元后处理中等值线及色彩图的绘制问题。

Post-process of Finite Element Method in Electrical Impedance Tomography

In the research of electrical impedance tomography (EIT), each calculation may produce a large amount of data(such as conductance , resistance etc.). The rule of these data is not clear and is hard to understand. How to express the calculation result by means of image in order that such parameters as conductance and resistance can be grasped from the image is significant in analyzing and understanding the calculation result and is helpful to the doctor. This paper has discussed the realization of the post-process of finite element method in electrical impedance tomography and we have developed the software of the post-process of finite element method using Visual C++ .NET and OpenGL. Some problems in drawing the contour line and color contour band have been solved properly.