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Caractérisation diélectrique du sang par spectroscopie de bio-impédance dans la bande [1 MHz - 1 Ghz] : conception et réalisation d'une cellule de mesure

Abstract : The electrical behaviour of biological tissue is entirely described by the permittivity and the electrical conductivity. The knowledge of these two dielectric parameters is of prime importance in the study of the interaction between electromagnetic wave and the biological tissue. The instrumentation developed in this work is dedicated to the measurement of the dielectric parameters of blood in the frequency range [1 MHz - 1 GHz]. The equipment is constituted by an impedancemeter (V/I method) associated with an open ended coaxial probe. This coaxial structure is perfectly adapted for measurement on liquid and makes it easier to deal with propagating effects, which appear in high frequency. An equivalent electrical circuit allows to take into account the electrical behaviour of the probe and to connect the measured value (impedance) to the searched parameters. Measurements were performed on human and animal (beef, sheep) blood. A study of the main influence factors of the measure showed the important role of the temperature and the haematocrite.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2001_0191_JASPARD.pdf
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https://hal.univ-lorraine.fr/tel-01746581
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Submitted on : Thursday, March 29, 2018 - 10:40:40 AM
Last modification on : Thursday, October 22, 2020 - 11:29:12 AM

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  • HAL Id : tel-01746581, version 1

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Frédéric Jaspard. Caractérisation diélectrique du sang par spectroscopie de bio-impédance dans la bande [1 MHz - 1 Ghz] : conception et réalisation d'une cellule de mesure. Autre. Université Henri Poincaré - Nancy 1, 2001. Français. ⟨NNT : 2001NAN10191⟩. ⟨tel-01746581⟩

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