International Journal of Control, Automation, and Systems

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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An Algorithm for Applying Multiple Currents Using Voltage Sources in Electrical Impedance Tomography

  • Choi, Myoung-Hwan (Department of Electrical and Electronics Engineering, Kangwon National University) ;
  • Kao, Tzu-Jen (Department of Biomedical Engineering, Rensselaer Polytechnic Institute) ;
  • Isaacson, David (Department of Mathematical Sciences, Rensselaer Polytechnic Institute) ;
  • Saulnier, Gary J. (Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute) ;
  • Newell, Jonathan C. (Department of Biomedical Engineering, Rensselaer Polytechnic Institute)
  • Published : 2008.08.31
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Abstract

A method to produce a desired current pattern in a multiple-source EIT system using voltage sources is presented. Application of current patterns to a body is known to be superior to the application of voltage patterns in terms of high spatial frequency noise suppression, resulting in high accuracy in conductivity and permittivity images. Since current sources are difficult and expensive to build, the use of voltage sources to apply the current pattern is desirable. An iterative algorithm presented in this paper generates the necessary voltage pattern that will produce the desired current pattern. The convergence of the algorithm is shown under the condition that the estimation error of the linear mapping matrix from voltage to current is small. Simulation results are presented to illustrate the convergence of the output current.

Keywords

References

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