基于毫米波雷达的心房颤动检测

Atrial fibrillation detection using millimeter-wave radar

提出一种基于毫米波雷达的非接触式实时心房颤动检测技术。首先使用60 GHz的PCR毫米波雷达持续采集目标对象的胸部回波信号,然后通过I-Q解调生成I-Q信号,接着基于有效点相位趋势评估法提取信号相位信息并获得微动信号,再经过数字滤波提取呼吸信号和心动信号,通过特征提取获得心脏运动特征,最后基于时域房颤波特征判断房颤发生情况。本研究的创新性主要体现在:为提取更精确的信号相位信息,提出有效点相位趋势评估法;为实现实时房颤检测,提出时域房颤判别方法。实验结果表明本研究的心房颤动检测系统对临床患者的房颤检测准确率达99.2%。

A novel technology is proposed for non-contact and real-time detection of atrial fibrillation using millimeter-wave radar.A 60 GHz PCR millimeter wave radar is used to continuously detect the chest echo signal of the subject.After signal acquisition,I-Q signal is generated through I-Q demodulation,and the signal phase information is extracted using effective points phase trend evaluation for obtaining the signals from oscillations in the chest wall,from which the respiratory signals and cardiac signals are extracted through digital filtering for the analysis of cardiac movement.Whether the atrial fibrillation occurs or not is determined by the characteristics of atrial fibrillation wave in the time domain.The effective points phase trend evaluation for extracting more accurate signal phase information and the time-domain method for real-time atrial fibrillation detection are the innovations of the study.The experimental results show that the proposed method achieves a detection accuracy of 99.2% in clinic.