基于非接触式测量的极短时心率变异性分析  

Very Short-term Heart Rate Variability Analysis Based on Non-contact Measurement

作　　者：张弛[1,2] 袁琳 陈诗惠 朱艺 侯晓旭[3] Zhang Chi;Yuan Lin;Chen Shihui;Zhu Yi;Hou Xiaoxu(School of Biological Science and Medical Engineering,Beihang University,Beijing 100083,China;不详)

机构地区：[1]北京航空航天大学生物与医学工程学院,北京100083 [2]北京航空航天大学生物医学工程高精尖创新中心,北京100083 [3]中国食品药品检定研究院,北京102629

出　　处：《航天医学与医学工程》2020年第2期134-142,共9页Space Medicine & Medical Engineering

基　　金：国家自然科学基金(11672026)。

摘　　要：目的实现基于成像式光电容积描记技术(iPPG)的心率变异性非接触式测量,并探讨极短时分析的可行性。方法使用高速摄像机拍摄12名男性受试者人脸视频,通过感兴趣区域提取,独立成分分析等方法得到与脉搏相关的iPPG信号,并进行了心率变异性的极短时分析。结果与心电信号相比,心率变异性的部分时域和频域特征具有较高的准确性和相关性:NNVGR和RMSSD的相关性最好,均在0.98以上,SDNN相关性在0.9左右;频域特征中,VLF、LF、HF的相关性均在0.8以上,pLF、pHF、LFHFRatio的相关性较低,且个体差异较大。结论iPPG技术可用于心率变异性的准确测量和监测,对于非接触条件下生理信号监测具有重要意义。Objective To test the feasibility of measurement and very short-term analysis of heart rate variability(HRV)based on image-based photoplethysmography(iPPG)which can realize non-contact estimation of physiological parameters.Methods High-speed camera was used to capture the video of human face of 12male subjects,and pulse-related iPPG signals were obtained through the region of interest extraction and independent component analysis.The HRV was consequently calculated based on the iPPG signals.Results Compared with ECG signals,some of the time-and frequency-domain features of HRV were highly accurate and relevant.The correlations of NNVGR and RMSSD were the best which were all above 0.98,while that of SDNN was about 0.9;In frequency domain features,the correlations of VLF,LF,HF were all above 0.8,and the correlations of PLF,PHF,LFHFRatio were low,and individual differences were large.Conclusion The study shows that iPPG technology can be used for accurate measurement and monitoring of HRV,which is of great significance for physiological signal monitoring under non-contact conditions.

关 键 词：非接触式 心率变异性 成像式光电容积描记技术 独立成分分析 

分 类 号：R331[医药卫生—人体生理学]