Determination of derivatives of transfer resistance on surface conductivity of finite elements by the conductivity method for solving the forward problem of Electrical Impedance Tomography
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2011, Vol 0, Issue 44
Abstract
The equation of derivative of square finite element surface conductivity, which is located in the arbitrary place of the domain, with current excitation on internal knots of the domain is got in this article. Calculation of transfer resistance of zones for zone and ray conductivity method due to complication of such equation with great number of finite elements is offered. These equations aren’t depended on shape of finite elements, but they are depended on shape of zones. Reduction of order of matrix for decreasing of labour intensiveness of operation is proposed. It is necessary due to the presence of great number of internal knots, which are deleted with equivalent transformations. The equivalent transformation of inverse matrix consists on deletion rows and columns with numbers of internal knots from matrix of all phantom, and for calculation of each column of transfer resistance derivatives it consists on deletion of zero rows and columns for this zone or that are multiplied with zero columns of conductivity matrix of zone.
Authors and Affiliations
I. Rybina, A. Rybin, O. Sharpan
Keywords
Related Articles
- EP ID EP309350
- DOI 10.20535/RADAP.2011.44.16-28
- Views 48
- Downloads 0
Calculation of the waveguied with the shape dielectric fulfills
Universe formula for calculations of the effective dielectric permittivity of the waveguied with the shape dielectric fulfills by one or two plate are received.
Photometric Absorbance Spectrum Analyzer of Slightly Transparent Biomaterials
Introduction. The measurement of optical radiation, especially the intensity of the light flux passing through biological tissues or other slightly transparent (cloudy) materials and the environments is a challenging pro...
The use of optimal spatial filtering by the method of common spatial pattern for the classification of EEG signals according to the type of brain activity
During EEG due to the volume conduction the signal from each individual source appears simultaneously in a number of channels registered from different leads. Therefore, the recorded EEG signal gives a blurred picture of...
Modeling three-dimensional crystal-like structures
Characteristics and constructional features of three-dimensional photon crystal-like structures are shown. The analysis of the structures show of good agreement experimental and theoretical results.
Complex of computer models for cold stress evaluation in water
Introduction. Due to the high value of water thermal conductivity comparing to air, stay of man in cold water (water temperature lower than 25 sup>°C) is associated with high life and health hazard. One of the ways to...