医疗卫生装备2018，Vol.39Issue(4)：1-5,5.DOI:10.7687/j.issn1003-8868.2018.04.001
一种颅脑EIT中多路电极/头皮接触阻抗的同步测量方法研究
Method for synchronous measurement of multichannel electrode-scalp contact impedances in brain EIT
摘要
Abstract
Objective To study a method for monitoring multichannel electrode-scalp contact impedances in electrical impedance tomography (EIT), and to provide support for exploring the impact of contact impedances on imaging and the suppression method.Methods A reference electrode was introduced for the system,placed on the back of the neck or the top of the head. In the spare time of boundary voltage signal acquisition phase, the method of two electrodes was adopted to measure the electrical impedance between each imaging electrode and reference electrode, which was used to analyze the characteristics of multichannel contact impedances.Based on the existing EIT hardware system,the module for monitoring multichannel contact impedance was implemented.Results The calibration board test showed that the measurement error of this method was less than 1‰,and the maximum relative fluctuation of the measurement result within 10 hours was less than 1‰. Preliminary human test indicated that this method had the ability to obtain two kinds of information about spatial consistency and temporal stability of 16-channel contact impedances. Conclusion This method has high accuracy and stability,so it meets the requirements of monitoring multichannel contact impedances in brain EIT.关键词
电阻抗断层成像/接触阻抗/参考电极法/空间一致性/时间稳定性Key words
EIT/contact impedance/reference electrode method/consistency in space/stability in time分类
医药卫生引用本文复制引用
马航,付峰,夏军营,刘本源,杨滨,陈荣庆,李蔚琛,刘学超,史学涛,董秀珍..一种颅脑EIT中多路电极/头皮接触阻抗的同步测量方法研究[J].医疗卫生装备,2018,39(4):1-5,5.基金项目
国家自然科学基金项目(51477176) （51477176）
军队重大项目(AWS14C006) （AWS14C006）
国家自然科学基金面上项目(61771475) （61771475）
陕西省青年科学基金(2017JQ8008) （2017JQ8008）
