基于膈肌重建的表面肌电信号采样点实验与分析  

Experiment and analysis of sampling points for s EMG signal based on diaphragm reconstruction

作　　者：费森杰 赵翠莲[1] 徐浩宇 FEI Senjie;ZHAO Cuilian;XU Haoyu(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 20007)

机构地区：[1]上海大学机电工程与自动化学院,上海200070

出　　处：《北京生物医学工程》2018年第6期611-617,共7页Beijing Biomedical Engineering

基　　金：上海科学技术委员会重点科技攻关项目(16441909000)资助

摘　　要：目的膈肌表面肌电信号是评价呼吸功能的客观指标之一,在采集过程中,电极放置位置的不同对膈肌表面肌电信号的质量有很大的影响,因此需要对放置采集电极的位置科学定位以获得较好质量的膈肌肌电信号。方法首先以某健康受试者的深呼、深吸两相下的CT图像为依据,通过医学建模软件Mimics重构膈肌深呼、深吸两相下的模型,测量并对比各自的膈肌长度参数,获得深呼、深吸两相下膈肌与肋骨的公共重合区域即对合区域,以此确定体表采集位置的范围。其次,设计膈肌表面肌电信号采样点实验,在上述位置上,采用64通道阵列电极获得同一健康受试者深呼吸时的肌电信号,计算各采样点去除心电噪声后的运动/静息比(Rij),并以此评价所采集的膈肌表面肌电信号的质量。结果通过采样点实验验证膈肌模型与Rij分布的一致性,进一步确定了膈肌表面肌电信号采集的较佳位置。结论人体右侧腋前线与第8～9根肋骨间,采集的膈肌肌电信号质量较好,并且略远离心脏的右侧区域采集到的信号更好。Objective The measurement of electromyography activity of diaphragm is one of theobjective indicators to evaluate respiratory function, yet the electrode position during the acquisition is a greatimpact on the quality of diaphragm electromyography （ EMGdi） . Therefore, it is necessary to scientificallylocate the position where the electrodes are placed. Methods Firstly, with the CT image of a healthy subjectunder deep breath, the diaphragm model of the deep.breathing position is reconstructed by the medicalmodeling software Mimics, the confinement area of the diaphragm is obtained by comparing the length parameterof the two.phase and the range of the electrode location is determined. Secondly, sampling point experiment ofthe EMGdi signal is designed, EMGdi signals of the same healthy subject are obtained in the aquisitionpositions with 8×8 array electrodes, the restoring period is used as the reference to calculate the motion / restratio after removing the ECG noise, and the quality of EMGdi signal based on the motion / rest ratio isevaluated. Results The consistency of the biomedical model and the distribution of Rijon array electrodes isverified by the sampling point experiment, and the precise position of the EMGdi signal acquisition is further determined on the basis of modeling. Conclusions Thearea between the intersections of 8-9 ribs of right side ofthe body surface is a good position for collecting theEMGdi signals and a little area on the right side is better.

关 键 词：膈肌肌电信号 重构 信号采集 运动/静息比 电极定位 

分 类 号：R318.04[医药卫生—生物医学工程]