Multiple simultaneous excitation electrical impedance tomography using low cross-correlated signals

Orkun Hasekioglu; M. Kemal Kiymik

doi:10.1117/12.131396

1 November 1992 Multiple simultaneous excitation electrical impedance tomography using low cross-correlated signals

Orkun Hasekioglu, M. Kemal Kiymik

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131396
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

Electrical Impedance Technology (EIT) is a non-destructive technique to image the electrical impedance cross-sections of a given phantom. Conventionally in transverse plane impedance imaging electrical signals (usually sinusoidal) are sequentially applied to the electrodes located circularly around the phantom at uniform angles. For each excitation the signal amplitudes and phases are measured at the other remaining electrodes. These measurements are then used to compute an impedance cross-section map of the phantom. This generic technique is not sufficiently fast to map rapidly varying impedance cross-sections, since all the electrodes need to be excited sequentially while amplitude and phase measurements are made at each one of the other electrodes. To circumvent this problem, it is suggested to use multiple simultaneous excitations with low cross-correlation signals instead of single sequential excitations applied one at a time. As a result the data acquisition time can be reduced by a factor of about the number of electrodes.

Citation Download Citation

Orkun Hasekioglu and M. Kemal Kiymik "Multiple simultaneous excitation electrical impedance tomography using low cross-correlated signals", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131396

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