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Design and validation of a multi-angle planar surface electrode system for electrical impedance tomography
Busra Oguzhan1, Mustafa Istanbullu2
1Department of Electrical and Electronics Engineering, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey.
Physical and Engineering Sciences in Medicine
|July 16, 2025
Summary
This study introduces a novel bioimpedance measurement system with concentric ring electrodes for noninvasive imaging. The system enhances spatial resolution and practical application for detecting internal tissue anomalies without radiation.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- Electrical Engineering
Background:
- Electrical impedance-based imaging offers noninvasive, radiation-free assessment of internal tissues.
- Traditional electrical impedance tomography (EIT) faces limitations in spatial resolution and practicality.
Purpose of the Study:
- To propose and validate a novel bioimpedance measurement (BIM) system with a planar concentric ring electrode configuration.
- To improve spatial resolution and practicality compared to conventional EIT.
Main Methods:
- A 32-electrode system with four concentric rings was designed for multiangle current injection and voltage measurement.
- Simulations using EIDORS and experimental tests with a saline tank were conducted for validation.
- Image reconstruction employed the Gauss-Newton algorithm with total variation regularization and image processing.
Main Results:
- Simulations successfully localized internal inhomogeneities.
- Experimental tests confirmed the system's effectiveness in detecting embedded objects.
- The system demonstrated robust measurement and image reconstruction capabilities.
Conclusions:
- The proposed BIM system provides a cost-effective, portable, and accurate solution for biomedical diagnostics.
- It shows potential for both clinical and nonclinical applications requiring noninvasive monitoring.
- The system enhances the detection of localized anomalies through improved spatial resolution.
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