School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing, 100191, China.
Department of Child Health Care Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.
Sci Rep. 2021 Mar 10;11(1):5564. doi: 10.1038/s41598-021-84971-7.
In this study, a wearable multichannel human magnetocardiogram (MCG) system based on a spin exchange relaxation-free regime (SERF) magnetometer array is developed. The MCG system consists of a magnetically shielded device, a wearable SERF magnetometer array, and a computer for data acquisition and processing. Multichannel MCG signals from a healthy human are successfully recorded simultaneously. Independent component analysis (ICA) and empirical mode decomposition (EMD) are used to denoise MCG data. MCG imaging is realized to visualize the magnetic and current distribution around the heart. The validity of the MCG signals detected by the system is verified by electrocardiogram (ECG) signals obtained at the same position, and similar features and intervals of cardiac signal waveform appear on both MCG and ECG. Experiments show that our wearable MCG system is reliable for detecting MCG signals and can provide cardiac electromagnetic activity imaging.
本研究开发了一种基于自旋交换弛豫自由（SERF）磁强计阵列的可穿戴式多通道人体磁心图（MCG）系统。MCG 系统由磁屏蔽装置、可穿戴 SERF 磁强计阵列和用于数据采集和处理的计算机组成。成功地同时记录了健康人的多通道 MCG 信号。采用独立成分分析（ICA）和经验模态分解（EMD）对 MCG 数据进行去噪。实现了 MCG 成像，以可视化心脏周围的磁场和电流分布。通过在同一位置获得的心电图（ECG）信号验证了系统检测到的 MCG 信号的有效性，并且 MCG 和 ECG 上都出现了类似的心脏信号波形特征和间隔。实验表明，我们的可穿戴式 MCG 系统可可靠地检测 MCG 信号，并可提供心脏电磁活动成像。
