Rapin, MichaelBraun, FabianAdler, AndyWacker, JosiasFrerichs, InezVogt, BarbaraChetelat, Olivier2019-06-182019-06-182019-06-182019-03-0110.1109/TBME.2018.2857199https://infoscience.epfl.ch/handle/20.500.14299/157855WOS:000459497300024This 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 non-invasive cardiovascular monitoring.Engineering, BiomedicalEngineeringwearable sensorstelemonitoringelectrical impedance tomography (eit)bioimpedancemultichannelfrequency-division multiplexingcalibrationactive electrodesdry electrodescooperative sensorsbody sensor networks (bsn)electrocardiography (ecg)multileadbiopotentialelectrical-impedance tomographyoptimal current patternsregional lung-functionconsensus statementventilationsystemtext::journal::journal article::research article