Browse > Article

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)
Publication Information
International Journal of Control, Automation, and Systems / v.6, no.4, 2008 , pp. 613-619 More about this Journal
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
Current sources; electrical impedance tomography; multiple currents; voltage sources;
Citations & Related Records

Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
연도 인용수 순위
  • Reference
1 A.S. Ross, An Adaptive Current Tomograph for Breast Cancer Detection, Ph.D. Thesis, Rensselaer Polytechnic Institute, Troy, NY, 2003
2 P. M. Edic, G. J. Saulnier, J. C. Newell, and D. Isaacson, "A real-time electrical impedance tomograph," IEEE Trans. on Biomedical Eng., vol. 42, no. 9, pp. 849-859, Sept. 1995   DOI   ScienceOn
3 Q. Zhu, W. R. B. Lionheart, F. J. Lidgey, C. N. McLeod, K. S. Paulson, and M. K. Pidcock, "An adaptive current tomograph using voltage sources," IEEE Trans. on Biomedical Eng., vol. 40, no. 2, pp. 163-168, Feb. 1993   DOI   ScienceOn
4 P. Metherall, D. C. Barber, R. H. Smallwood, and B. H. Brown, "Three-dimensional electrical impedance tomography," Nature, vol. 380, pp. 509-512, April 1996   DOI   ScienceOn
5 A. Hartov, R. A. Mazzarese, F. R. Reiss, T. E. Kerner, K. S. Osterman, D. B. Williams, and K. D. Paulsen, "A multichannel continuously selectable multifrequency electrical impedance spectroscopy measurement system," IEEE Trans. on Biomedical Eng., vol. 47, no. 1, pp. 49-58, Jan. 2000   DOI   ScienceOn
6 R. D. Cook, G. J Saulnier, D. G. Gisser, J. C. Goble, J. C. Newell, and D. Isaacson, "ACT 3: A high speed, high precision electrical impedance tomography," IEEE Trans. on Biomedical Eng., vol. 41, pp. 713-722, Aug. 1994   DOI   ScienceOn
7 R. W. M. Smith, I. L. Freeston, and B. H. Brown, "A real-time electrical impedance tomography system for clinical use - Design and preliminary results," IEEE Trans. on Biomedical Eng., vol. 42, pp. 133-140, Feb. 1995   DOI   ScienceOn
8 D. Isaacson, "Distinguishability of conductivities by electric current computed tomography," IEEE Trans. on Medical Imaging, vol. 5, no. 2, pp. 92-95, 1986
9 A. Hartov, E. Demidenko, N. Soni, M. Markova, and K. Paulsen, "Using voltage sources as current drivers for electrical impedance tomography," Measurement Science and Technology, vol. 13, pp. 1425-1430, 2002   DOI   ScienceOn
10 G. J. Saulnier, R. S. Blue, J. C. Newell, D. Isaacson, and P. M. Edic, "Electrical impedance tomography," IEEE Signal Processing Magazine, vol. 18, no. 6, pp. 31-43, Nov. 2001   DOI   ScienceOn
11 J. C. Newell, D. G. Gisser, and D. Isaacson, "An electric current tomograph," IEEE Trans. on Biomedical Engineering, vol. 35, no. 10, pp. 828-833, Oct. 1988   DOI   ScienceOn