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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.

Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Fur Medizinische Physik and the European Federation of Organisations for Medical Physics
|January 1, 1992
PubMed
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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.

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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.