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中文摘要: 构建以FPGA为核心控制器的两层32电极的高性能三维电阻抗成像系统，详细描述了系统的软硬件设计、系统性能测试及成像试验,图像重建采用共轭梯度算法。测试结果表明，系统测量精度达0.082%，系统空间分辨率达0.51%，信噪比达60.3dB。在盛有盐水的实验盐水槽进行成像试验，结果表明该系统能够准确识别待测区域目标物的个数、位置、大小、运动状态等信息。系统的构建为深入研究三维电阻抗成像等关键技术提供可靠的硬件平台。
Abstract:A set of 3D FPGA-based high-performance electrical impedance tomography(EIT)system with two-layer 32 electrodes is designed and introduced. The software and hardware are developed and tested through experiments. The images are reconstructed by conjugate gradient（CG）algorithm. The results indicate that the average accuracy of the 3D EIT system can reach 0.082%, the spatial resolution can reach 0.51% and SNR is 60.3dB.The imaging experiments of organic glass rods are carried out in an lab-made tank filled with saline and the images can accurately display the number of rods and their positions, shapes and even the trace of its movement.Consequently, the research lay a firm foundation for the further study on 3D electrical impedance tomography.
文章编号：cg15000988 中图分类号： 文献标志码：
基金项目:呼吸过程三维电阻抗成像方法研究
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