IEEE Trans Biomed Eng. 2019 Mar;66(3):810-820. doi: 10.1109/TBME.2018.2857199. Epub 2018 Jul 18.
This paper presents a wearable sensor architecture for frequency-multiplexed electrical impedance tomography (EIT) and synchronous multilead electrocardiogram (ECG) data acquisition. The system is based on a novel electronic sensing architecture, called cooperative sensors, that significantly reduces the cabling complexity and enables flexible EIT stimulation and measurement patterns. The cooperative-sensor architecture was initially designed for ECG and has been extended for multichannel bioimpedance measurement. This approach allows for an adjustable EIT stimulation pattern via frequency-division multiplexing. This paper also shows a calibration procedure as well as EIT system noise performance assessment. Preliminary measurements on a healthy volunteer showed the ability of the wearable system to measure EIT data synchronously with multilead ECG. Ventilation-related and heartbeat-related EIT images were reconstructed, demonstrating the feasibility of the proposed architecture for noninvasive cardiovascular monitoring.
本文提出了一种用于频率复用电阻抗断层成像（EIT）和同步多导联心电图（ECG）数据采集的可穿戴传感器架构。该系统基于一种新颖的电子传感架构，称为协作传感器，它显著降低了电缆复杂性，并实现了灵活的 EIT 刺激和测量模式。协作传感器架构最初是为 ECG 设计的，现已扩展到多通道生物阻抗测量。这种方法允许通过频分复用实现可调节的 EIT 刺激模式。本文还展示了校准程序以及 EIT 系统噪声性能评估。在健康志愿者上的初步测量表明，可穿戴系统能够与多导联 ECG 同步测量 EIT 数据。重建了与通气和心跳相关的 EIT 图像，证明了所提出的架构用于非侵入性心血管监测的可行性。
