Project detail

Electrical impedance tomography in dissipative media

Duration: 01.01.2003 — 31.12.2004

Funding resources

Czech Science Foundation - Standardní projekty

- whole funder (2002-03-26 - not assigned)

On the project

The aim of the project is to improve Electrical Impedance Tomography (EIT) method. EIT will use the finite element based method for the reconstruction of two-dimensional and three-dimensional admittance distributions in both industrial processes and in biological tissue. Existing two-dimensional program MEP, based on the Finite Element Method, will be used for the solution of the forward problem. This program, developed by the authors of the project, has plenty of original contributions for evaluation of static, harmonic, and transient electric fields in dissipative media. The program will be upgraded for the solution of 3-D problems. Different smoothness operators will be involved into the objective functions to assure finding acceptable minima. The process is known as smoothness-constrained inversion. An attempt will be done to develop new smoothness operators for indication of thin conductive and dielectric layers. Our goal is to improve the quality of the images and the numerical complexity of the reconstruction method. In order to reduce the computational load, we adopt a linearized approximation to the forward problem that describes the relationship between the unknown conductivity and the measurements.

Keywords
Electrical impedance tomography, reconstruction admittance distribution, biological tissue, finite element method, forward problem, inverse problem.

Mark

GA102/03/1108

Default language

Czech

People responsible

Dědek Libor, prof. Ing., CSc. - principal person responsible

Units

Department of Theoretical and Experimental Electrical Engineering
- beneficiary (2002-03-26 - not assigned)

Results

DĚDKOVÁ, J., FILIPOVÁ, P. A comparison of different methods for the gradient evaluation in the inverse problems of the impedance tomography. In Advanced Methods in the Theory of Electrical Engineering. Advanced Methods in the Theory of Electrical Engineering. Plzeň: ZČU, 2003. p. E01 ( p.)ISBN: 80-7082-960-5.
Detail

VALSA, J., DĚDKOVÁ, J., DĚDEK, L. Calculation of sensitivities in two-dimmensional electrical impedance tomography. In 26th International conference of fundamentals of electrotechnics and circuit theory IC - SPETO 2003. Gliwice: Silesian University of Technology, 2003. p. 43 ( p.)ISBN: 83-85940-25-1.
Detail

DĚDEK, L., DĚDKOVÁ, J. Idenfitication of Conductivity of Electrodes using EIT Total Variation primal-dual method. WSEAS Transactions on Systems, 2004, vol. 10, no. 3, p. 3013 ( p.)ISSN: 1109-2777.
Detail

DĚDKOVÁ, J., DĚDEK, L. Implementation of Thin Conductive Layers in Electrical Impedance Tomography. In IEEE International Midwest Symposium On Circuits and Systems. Cairo: IEEE, 2003. p. 1 ( p.)
Detail

DĚDEK, L. Contribution to the three-dimensional tomography model. In Advanced methods in the theory of electrical engineering. Plzeň: University of West Bohemia, 2003. p. A23 ( p.)ISBN: 80-7082-960-5.
Detail

BRANČÍK, L. Sensitivities Assesment in Electrical Impedance Tomography Based on Reciprocity Theorem. In Proceedings of EDS 2003, Electronic Devices and Systems Conference. Brno: 2003. p. 146 ( p.)ISBN: 80-214-2452-4.
Detail

DĚDEK, L., DĚDKOVÁ, J. Evaluation of thin layer conductivity in a volume using Electrical Impedance Tomography. In Analysis of biomedical signals and images, 17th int. Eurasip conference. Brno: VUTIUM Press, Brno, 2004. p. 173-175 ( p.)ISBN: 80-214-2633-0.
Detail

DĚDKOVÁ, J., DĚDEK, L. Reconstruction od two-dimensional images of the thin conductive layers in Electrical Impedance Tomography. In Analysis of biomedical signals and images. Brno: VUTIUM, 2004. p. 417-419 ( p.)ISBN: 80-214-2633-0.
Detail

DĚDEK, L., DĚDKOVÁ, J. Identification of step surface conductivity distribution in electrical impedance tomography using Tikhonov regularization. In Abstracts of 11th Int. IGTE Symp. on numerical field calculation. IGTE 11. Graz: TU Graz, Rakousko, 2004. p. 48 ( p.)
Detail

BRANČÍK, L. Comparative Study of Jacobian Calculation Techniques in Electrical Impedance Tomography. In Proceedings of VI. International Workshop "Computational Problems of Electrical Engineering". Zakopane: 2004. p. 101 ( p.)ISBN: 83-916444-4-8.
Detail

BRANČÍK, L. Efficient Techniques of Sensitivity Calculation for Electrical Impedance Tomography. In Proceedings of ICSES'04. International Conference on Signals and Electronic Systems. Poznaň: 2004. p. 167 ( p.)ISBN: 83-906074-7-6.
Detail

DĚDKOVÁ, J., DĚDEK, L. Identification of Linear Surface Conductivity Distribution Using EIT Total Variation Primal Dual Regularization. In The 11th International IGTE Symposium on Num. Field Calc. in El. Eng. IGTE 11. Graz: TU Graz, 2004. p. 66 ( p.)ISBN: 3-902465-07-7.
Detail

DĚDKOVÁ, J., DĚDEK, L. Implementation of Thin Conductive Layers in Electrical Impedance Tomography. In MWSCAS. Cairo: IEEE, 2004. p. 1 ( p.)ISBN: 0-7803-8295-1.
Detail

DĚDEK, L., DĚDKOVÁ, J. Regularization by means of the total variation primal dual interior point method applied to the electrical resistance tomography. In 3. Matematický workshop. Brno: FAST VUT, 2004. p. 29 ( p.)ISBN: 80-214-2741-8.
Detail

DĚDKOVÁ, J., DĚDEK, L. Identification of Contact Conductivity of Electrodes Using EIT Total Variation Primal Dual Regularization. In 3. Matematický workshop. Brno: FAST VUT, 2004. p. 31 ( p.)ISBN: 80-214-2741-8.
Detail

DĚDEK, L., DĚDKOVÁ, J. Idenfitication of Conductivity of Electrodes using EIT Total Variation primal-dual method. In Proceedings of the WSEAS International Conferences. Athens: WSEAS, 2004. p. 3013 ( p.)ISBN: 960-8457-07-6.
Detail

DĚDEK, L., DĚDKOVÁ, J. Application of Electrical Resistance Tomography to Nondestructive Testing of Carbon Fiber Honeycombs. In Proceedings of the WSEAS International Conferences. Athens: WSEAS, 2004. p. 3010 ( p.)ISBN: 960-8457-07-6.
Detail

DĚDKOVÁ, J., DĚDEK, L. Identification of Linear Surface Conductivity Distribution Using EIT Total Variation Primal Dual Regularization. In 11th International IGTE Symposium. Graz, Austria: TU Graz, 2004. p. 278 ( p.)ISBN: 3-902465-07-7.
Detail

DĚDEK, L., DĚDKOVÁ, J. Identification of Step Surface Conductivity Distribution in Electrical Impedance Tomography Using Different Regularizations. In 11th International IGTE Symposium. Graz, Austria: TU Graz, 2004. p. 202 ( p.)ISBN: 3-902465-07-7.
Detail

Rez Jiří. Impedanční tomografie a její použití. In Defektoskopia 2005. nedestruktivní defektoskopie, magnetické metody: VM print Leopoldov, 2005. s. 44 ( s.)ISBN: 80-968724-5-1.
Detail

SEDLÁČEK, J.; SZABÓ, Z. Synthesis of Emi Filter Models. In Future Security. 1. Karlsruhe: Universitatsverlag Karlsruhe, 2007. p. 232-236. ISBN: 978-3-86644-147-7.
Detail

DĚDEK, L., DĚDKOVÁ, J. Application of Electrical Resistance Tomography to Nondestructive Testing of Carbon Fiber Honeycombs. WSEAS Transactions on Systems, 2004, vol. 10, no. 3, p. 3010 ( p.)ISSN: 1109-2777.
Detail

REZ, J.: Hysterezigraf. Laboratoř magnetických měření ÚTEE FEKT Brno. (funkční vzorek)
Detail

REZ, J.: EIT; Experimentální měřicí zařízení pro impedanční tomografii. UTEE FEKT VUT Kolejní 2906/4. (funkční vzorek)
Detail

Responsibility: Dědek Libor, prof. Ing., CSc.