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Electrical impedance tomography systems based on voltage drive
W Sansen1, B Geeraerts, W Van Petegem
1KU Leuven, Elektrotechniek, ESAT-MICAS, Belgium.
Summary
Researchers developed a new Electrical Impedance Tomography (EIT) system for advanced imaging. This system enables multifrequency and real-time image reconstruction using a PC-controlled setup.
Area of Science:
- Electrical Engineering
- Biomedical Imaging
- Medical Device Technology
Background:
- Electrical Impedance Tomography (EIT) is an emerging imaging modality.
- Advancements in hardware and control systems are crucial for improving EIT capabilities.
Purpose of the Study:
- To present the design and realization of a novel EIT system.
- To highlight the specific characteristics and performance of the latest EIT hardware.
Main Methods:
- Utilizing a PC for data collection control and image reconstruction.
- Implementing a voltage drive strategy without common-mode feedback.
- Employing a function generator for signal frequencies between 10 and 100 kHz.
- Incorporating 16-bit analog-to-digital converters with a sampling rate of 50,000 samples/s.
Main Results:
- Successful acquisition of static EIT images.
- Demonstration of (semi-)real-time imaging capabilities with the mark IV system.
- Capability to produce multifrequency EIT images.
Conclusions:
- The developed EIT system offers enhanced imaging performance.
- The PC-controlled hardware facilitates advanced data acquisition and image reconstruction.
- The system supports both static and dynamic imaging applications.