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Simultaneous Acquisition of EIT and ECG Signals on Active EIT Electrodes
IEEE Transactions on Bio-Medical Engineering
|March 3, 2025
Summary
This study presents a novel method for simultaneously acquiring electrocardiogram (ECG) and electrical impedance tomography (EIT) data using active electrodes. This integrated approach simplifies setup and enhances cardiac imaging by enabling ECG signal reconstruction and heart current vector analysis.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Physiological Monitoring
Background:
- Electrical Impedance Tomography (EIT) systems typically require separate electrocardiogram (ECG) acquisition.
- Simultaneous acquisition of physiological signals with EIT can improve image interpretation and enable advanced analysis.
Purpose of the Study:
- To introduce a new method for simultaneous acquisition of ECG signals and EIT measurements using active electrodes.
- To demonstrate the feasibility of reconstructing ECG waveforms and heart current source vectors from EIT electrodes.
Main Methods:
- Simultaneous acquisition of ECG and EIT data on active electrodes.
- Application of Howland noise reduction, integrate-and-dump filter, and adaptive filtering for ECG extraction.
- Reconstruction of heart current source vectors from recovered ECG waveforms.
Main Results:
- Successful simultaneous acquisition of ECG signals and EIT data in human subjects.
- Demonstration of accurate ECG signal extraction without amplitude loss.
- Reconstruction of heart current source vectors from 32 electrodes, providing an approximate solution to the electrocardiography inverse problem.
Conclusions:
- The developed method eliminates the need for a separate ECG system.
- Time-aligned ECG signals improve the interpretation of EIT perfusion images.
- Simultaneous ECG and EIT acquisition facilitates real-time reconstruction of cardiac electrical activity and EIT imaging.
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