Title :
Direct sensitivity matrix approach for fast 3-D reconstruction in electrical impedance imaging
Author :
Morucci, J.P. ; Granie, M. ; Lei, M. ; Chabert, M. ; Dai, W.W.
Author_Institution :
Inst. Nat. de la Sante et de la Recherche Med., Toulouse, France
Abstract :
A method called the direct sensitivity matrix (DSM) method is proposed, which assumes the differentiability of the conductivity distribution with respect to boundary voltage measurement and presents similitude with the method proposed by Tarassenko (1985). The DSM is composed of direct sensitivity coefficients (DSC) defined as the conductivity change of a pixel divided by a resulting peripheral voltage change. There is no need for inversion of the DSM, and the reconstructed image of conductivity change is obtained directly by the product of the DSM and the measurement vector. The boundary element method (BEM) is used in the construction of DSM
Keywords :
boundary-elements methods; electric impedance imaging; image reconstruction; medical image processing; boundary element method; conductivity change; conductivity distribution differentiability; direct sensitivity coefficients; direct sensitivity matrix approach; electrical impedance imaging; fast 3-D reconstruction; measurement vector; peripheral voltage change; reconstructed image; reconstruction algorithm; Boundary element methods; Conductivity measurement; Current measurement; Electrodes; Image reconstruction; Impedance; Reconstruction algorithms; Three dimensional displays; Tomography; Voltage measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.411915
