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https://doi.org/10.5821/disser...
Doctoral thesis . 2023 . Peer-reviewed
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Tomografía de impedancia eléctrica para aplicaciones médicas

Authors: Rosell Ferrer, Francesc Xavier;

Tomografía de impedancia eléctrica para aplicaciones médicas

Abstract

En esta tesis se analizan las bases de la Tomografía de Impedancia Eléctrica (TIE) desde los aspectos de campos electromagnéticos, los electrodos y las propiedades eléctricas de los tejidos en seres vivos. Se analizan los distintos tipos de sistemas electrónicos para poder obtener los datos de impedancia en sistemas multielectrodo para TIE y los métodos para obtención de imágenes. A partir de estos estudios se diseña e construye un sistema de TIE. Este sistema se verifica en maquetas resistivas y en medidas sobre humanos. Las contribuciones más relevantes son en el diseño del equipo (con soluciones inéditas como la realimentación activa y los algoritmos para calibración y detección de forma), el análisis de la sensibilidad para distintas estrategias de inyección y el estudio sobre impedancia de electrodos en diversas posiciones del cuerpo. In this thesis we analyze the basic concepts of the Electrical Impedance Tomography (EIT), from electromagnetic field theory, electrodes and the electrical properties of biological tissues. We analyze different types of electronic systems to be able to obtain the information of impedance in multielectrode systems for TIE and the methods for obtaining images. From these studies, a TIE system is designed and constructed. This system is tested in resistive models and in measures on human beings. The most relevant contributions are in the design of the equipment (with innovative solutions like the active feedback and the algorithms for calibration and detection of the objects's shape section), the analysis of the sensitivity for different strategies of current injection and the study of electrode impedance in different body locations

Country
Spain
Keywords

reconstrucció imatges, impedancia electrica, tomografia, Tomografia, equips mèdics, impedance, Impedància (Electricitat) -- Aplicacions, :Enginyeria electrònica [Àrees temàtiques de la UPC], tomography, electrical, Àrees temàtiques de la UPC::Enginyeria electrònica, 621.3

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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