计算机技术与发展2016，Vol.26Issue(6)：138-141,4.DOI:10.3969/j.issn.1673-629X.2016.06.030
基于ARM的32电极电阻抗成像系统设计
Design of 32 Electrodes Electrical Impedance Tomography System Based on ARM
摘要
Abstract
Electrical impedance tomography is a new technique of medical imaging,which has a broad application prospect in biological information detection and imaging. In this paper,improved design is carried out in the case of low acquisition speed,poor real-time per-formance and unsatisfying resolution of the EIT system. In the experiment,an ARM processor is used to construct the embedded EIT sys-tem,the 32-electrode physical model is acted as a detection object,and the 32-channel multiplexer realizes the switching among electrode excitation and measurement channels. The excitation current signal injected into the model is passed through the pre-filter,two-stage am-plifier and other signal processing technique to get imaging data,from which difference between existence and non-existence of the tes-ting object is obtained. Further,image reconstruction of electrical impedance tomography is achieved through the sensitivity matrix algo-rithm. The experiment shows that the system has a good effect,and high resolution,and could effectively realize the detection of the target area.关键词
电阻抗成像/ARM处理器/32电极物理模型/32通道多路开关/两级放大/敏感矩阵算法Key words
electrical impedance tomography/ARM processor/32 electrodes physical model/32 channels multiplexer/two-stage amplifi-cation/sensitivity matrix algorithm分类
信息技术与安全科学引用本文复制引用
饶水发,戎舟..基于ARM的32电极电阻抗成像系统设计[J].计算机技术与发展,2016,26(6):138-141,4.基金项目
国家自然科学基金资助项目(61203213) （61203213）
