Monitoring lungs with electrical impedance tomography

Autor:	Joyce da Silva Bevilacqua, Roberto Masaishi Yoshikawa
Rok vydání:	2007
Předmět:	business.industry Applied Mathematics Acoustics Physics::Medical Physics ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Engineering Applied potential Conductivity Dipole model Computer Science Applications Simulated data Electrode Computer vision Reconstructed image Artificial intelligence business Electrical impedance tomography Mathematics Voltage
Zdroj:	Inverse Problems in Science and Engineering. 15:325-337
ISSN:	1741-5985 1741-5977
DOI:	10.1080/17415970600839051
Popis:	To monitor lungs, a real-time device based on applied potential must be able to detect conductivity variations in any area (cm2) inside the thorax at each 40 ms. An image, that represents the conductivity distribution of a transversal slice of the thorax, is reconstructed based on applied current and voltage measurements on the boundary. The quality of the image is strongly related with the total number of electrodes and regularization techniques. In this work, the total number of independent measurements is improved by an interpolation scheme applied to the measured voltages, to simulate extra electrodes and preserve the dipole model for electrical potential. Comparison parameters are the object position and maximum conductivity of the reconstructed image. The technique is applied to experimental and simulated data using backprojection algorithm, demonstrating a significant improvement of the images. Only a neighborhood filter is applied to all images to enhance the backprojection reconstruction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::84d1158713d1029061633392568422a2 https://doi.org/10.1080/17415970600839051 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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