基于电阻抗断层成像的一维参数提取研究  

One-dimensional index extraction based on electrical impedance tomography system

作　　者：刘蒙 代萌[2] 徐灿华[2] 杨滨[2] 史学涛[2] 董秀珍[2] 付峰[2] 

机构地区：[1]解放军323医院医学工程科,西安710054 [2]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》2015年第7期9-12,共4页Chinese Medical Equipment Journal

基　　金：国家自然科学基金项目(51477176)

摘　　要：目的:利用电阻抗断层成像(electrical impedance tomography,EIT)数据提取对生物组织整体电阻抗变化敏感的一维参数。方法:分析电阻抗断层成像过程,利用对电阻抗整体变化趋势敏感的数据构建一维参数,并进行仿真、物理模型及临床验证实验。结果:实验证实,通过电阻抗断层成像的原始数据构建的一维参数与生物组织整体电阻抗的变化具有相关性,可用于实时监测整体电阻抗的变化趋势。结论:提取的EIT一维参数对电阻抗整体的变化趋势具有较高的敏感性,和二维动态图像结合使用,可提供更多的生物组织电阻抗监测信息。Objective To extract the one-dimensional index from electrical impedance tomography（EIT） raw data in order to reflect the tendency of impedance changes of the measured tissues. Methods The process of EIT was analyzed, and the one-dimensional index was established with the data sensitive to the changes of EIT, and the simulation experiments,physical model tests and clinical trials were carried out. Results The one-dimensional index was proved to have a correlation with the electrical impedance of the biological tissue, and thus could be used for the real-time monitoring of the changes of electrical impedance. Conclusion The extracted EIT one-dimensional index has a high sensitivity to the changes of electrical impedance, and can be combined with the two-dimensional dynamic image for the monitoring of biological tissue electrical impedance.

关 键 词：生物电阻抗断层成像 EIT一维参数 Geselowitz敏感性关系 提取 

分 类 号：R310[医药卫生—基础医学]