摘要
运动伪迹是动态生理信号的主要噪声来源,严重影响计算机分析和医生诊断。通过同步采集心电和电极皮肤接触阻抗信号作自适应滤波消除运动伪迹噪声,得到基线稳定的心电信号。使用120Hz、25μA的激励电流通过心电电极作用于人体,采用三阶RLS自适应滤波算法处理心电信号可以有效抑制基线漂移。系统应用到临床的移动心率监护,使得监护范围从病房扩大到病区,大大增加病人的活动空间,为患者提供舒适可靠的心电监护服务。
Motion artifact is a significant source of noise in ambulatory physiologic signals and can affect the diagnoses seriously. To cope with this problem,we adopted certain methods for removing motion artifact from ECG signals via synchronous acquisition of the elector/skin impedance as the reference signal of adaptive filter. The results demonstrated that 3rd order RLS adaptive filter can remove the baseline shift effectively with an exciting current of 120Hz and 50μA. Such system was implemented to investigate the utility of ambulatory heart rate monitoring,which provides convenient and reliable monitoring services for patients.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2010年第3期529-532,543,共5页
Journal of Biomedical Engineering
基金
广东省科技计划项目资助(2007B031302003
2007B010400055)
关键词
运动伪迹
阻抗
自适应滤波
心电图
Motion artifact
Impedance
Adaptive filter
Electrocardiograph（ECG）
