电阻抗断层成像系统的非正常连接电极实时检测方法  

Real-time detection of detached electrodes in electrical impedance tomography

作　　者：张戈[1] 代萌[1] 徐灿华[1] 李蔚琛 史学涛[1] 尤富生[1] 付峰[1] 董秀珍[1] 

机构地区：[1]第四军医大学生物医学工程学院,西安710032

出　　处：《医疗卫生装备》2014年第11期1-4,162,共5页Chinese Medical Equipment Journal

基　　金：国家科技支撑计划课题(2012BAI20B02;2012BAI19B01;2011BAI08B13);国家自然科学基金课题(51207161);国家自然科学基金面上课题(61071033);军队面上课题(CWS12J102);陕西省科技统筹项目(2012KTCG04-13)

摘　　要：目的:研究一种适用于电阻抗断层成像(electrical impedance tomography,EIT)系统的多电极非正常连接的实时检测方法,便于及时发现不良电极,减少因电极造成的数据损失,为EIT提供可靠的成像数据。方法:基于正常测量数据的相似性,利用采集的测量数据计算电极的相关系数并加权后循环判断,实现非正常连接电极的检测,并开展物理模型实验和人体实验验证方法的有效性。结果:物理模型实验和人体实验结果表明,该方法能准确地检测出多个脱落电极,并能够有效避免正常电极被误判为非正常连接的情况。结论:该方法是一种有效的非正常电极的实时检测方法。Objective To develop a real-time method to detect multi-electrodes＇ detachment for electrical impedance tomography detection and minimize the data loss caused by faulty electrodes on account of timely management. Methods The method of detached electrodes detection was proposed based on the similarity of right data. Correlation coefficients weighted by data collection were calculated circularly to estimate each electrode. Afterwards, physical phantom experiments and human experiments were conducted to verify the validity of this method. Results Both physical phantom experiments and human experiments proved that detached electrodes could be precisely detected by this method. Compared with other methods, this method avoided erroneous judgment effectively. Conclusion This method offers an efficient way to detect multiple detached electrodes in real time.

关 键 词：电阻抗断层成像 电极 加权相关系数 

分 类 号：R310[医药卫生—基础医学]