Rotational electrical impedance tomography

A high performance rotational EIT (REIT) system capable of producing better quality EIT images is developed by expanding the independent measurements. In this system, electrodes are attached to a rotational phantom tank which is driven by a microstepping motor. The measurement site of the electrode pairs can be precisely changed. We increase the independent measurements by moving electrodes from the original location to a subsequent location. Increasing the number of independent measurements enhances the resolution of the impedance image and improves the quality arising from the ill-posed condition. The experimental results clearly show the improvement of the REIT image. It is believed that this improvement will provide help in the field of electrical impedance tomography.

[1]  Haiqing Li,et al.  Application of electrical capacitance tomography to the void fraction measurement of two-phase flow , 2003, IEEE Trans. Instrum. Meas..

[2]  Richard C. Tozer,et al.  Electrical impedance tomography applied to semiconductor wafer characterization , 1996 .

[3]  Trevor York,et al.  Electrical impedance tomography with non-stationary electrodes , 2006 .

[4]  Mart Min,et al.  Lock-in measurement of bio-impedance variations , 2000 .

[5]  Hugh McCann,et al.  Electrode configurations for improved spatial resolution in electrical impedance tomography , 2002 .

[6]  William R B Lionheart,et al.  A Matlab toolkit for three-dimensional electrical impedance tomography: a contribution to the Electrical Impedance and Diffuse Optical Reconstruction Software project , 2002 .

[7]  Trevor A. York.  Status of electrical tomography in industrial applications , 2001, J. Electronic Imaging.

[8]  En Li.  Optimum design on structure , 2002 .

[9]  이윤준,et al.  Electrical Resistance Tomography의 영상복원 기법의 비교 , 2005 .

[10]  L.W. Hart,et al.  A noninvasive electromagnetic conductivity sensor for biomedical applications , 1988, IEEE Transactions on Biomedical Engineering.

[11]  F. J. Dickin,et al.  Optimal sized electrodes for electrical resistance tomography , 1998 .

[12]  Mi Wang,et al.  Electrical resistance tomography for process applications , 1996 .

[13]  Y. L. Mo,et al.  Increasing image resolution in electrical impedance tomography , 2002 .

[14]  I Frerichs,et al.  Electrical impedance tomography (EIT) in applications related to lung and ventilation: a review of experimental and clinical activities. , 2000, Physiological measurement.

[15]  D S Holder,et al.  Current approaches to analogue instrumentation design in electrical impedance tomography , 1996, Physiological measurement.

[16]  David Isaacson,et al.  Electrical Impedance Tomography , 1999, SIAM Rev..

[17]  B H Brown,et al.  Noise equalization within EIT images. , 1994, Physiological measurement.

[18]  Wang Huaxiang,et al.  Optimum design of the structure of the electrode for a medical EIT system , 2001 .

[19]  P Record,et al.  Conducting boundary strategy: a new technique for medical EIT. , 1995, Physiological measurement.

[20]  Brian H. Brown,et al.  Medical impedance tomography and process impedance tomography: a brief review , 2001 .

[21]  P. Hua,et al.  Using compound electrodes in electrical impedance tomography , 1993, IEEE Transactions on Biomedical Engineering.

[22]  Zdzislaw Szczepanik,et al.  Frequency analysis of electrical impedance tomography system , 2000, IEEE Trans. Instrum. Meas..