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Mise au point et qualification d'une technique de mesure du taux de présence local par tomographie à rayons X

Emmanuel Jouet 1
1 TIMC-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : The aim of this etudy la to develop an instrumentation to measure the local void fraction man in an air - water flow by X-ray tomography. Alter an exhaustive literature survey, the selected reconstruction algorithme are compared to choose the mort effective. Several improvements are added and tested to enhance the reconstruction accuracy in the vicinity of the pipe walls. An experimental parallel beam tomographie bench hm been developed and ils operating parameters have been optimized. The acquisition system and the reconstruction algorithm are used to man phantoms, homogeneous or non - homogeneous air - water bubbly flows and bundle flows with regular or interlaced sampling echeme. The method la validated by comparing with the void fraction mana memured with an optical probe. At the end, the method la extended to the fan-beam geometry.
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Submitted on : Thursday, March 18, 2004 - 12:14:04 PM
Last modification on : Tuesday, November 24, 2020 - 4:18:04 PM
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Emmanuel Jouet. Mise au point et qualification d'une technique de mesure du taux de présence local par tomographie à rayons X. Physique [physics]. Institut National Polytechnique de Grenoble - INPG, 2001. Français. ⟨tel-00005372⟩

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