Wu, Y;
Jiang, D;
Bardill, A;
de Gelidi, S;
Bayford, R;
Demosthenous, A;
(2018)
A High Frame Rate Wearable EIT System Using Active Electrode ASICs for Lung Respiration and Heart Rate Monitoring.
IEEE Transactions on Circuits and Systems I: Regular Papers
, 65
(11)
pp. 3810-3820.
10.1109/TCSI.2018.2858148.
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Abstract
A high specification, wearable, electrical impedance tomography (EIT) system with 32 active electrodes is presented. Each electrode has an application specific integrated circuit (ASIC) mounted on a flexible printed circuit board, which is then wrapped inside a disposable fabric cover containing silver-coated electrodes to form the wearable belt. It is connected to a central hub that operates all the 32 ASICs. Each ASIC comprises a high-performance current driver capable of up to 6 mA p-p output, a voltage buffer for EIT and heart rate signal recording as well as contact impedance monitoring, and a sensor buffer that provides multi-parameter sensing. The ASIC was designed in a CMOS 0.35-μm high-voltage process technology. It operates from ±9 V power supplies and occupies a total die area of 3.9 mm^{2}. The EIT system has a bandwidth of 500 kHz and employs two parallel data acquisition channels to achieve a frame rate of 107 frames/s, the fastest wearable EIT system reported to date. Measured results show that the system has a measurement accuracy of 98.88% and a minimum EIT detectability of 0.86 Q/frame. Its successful operation in capturing EIT lung respiration and heart rate biosignals from a volunteer is demonstrated.
| Type: | Article |
|---|---|
| Title: | A High Frame Rate Wearable EIT System Using Active Electrode ASICs for Lung Respiration and Heart Rate Monitoring |
| Location: | Taormina, ITALY |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TCSI.2018.2858148 |
| Publisher version: | https://doi.org/10.1109/TCSI.2018.2858148 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Electrodes, Tomography, Belts, Biomedical monitoring, Monitoring, Lung, Heart rate |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059226 |
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