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<dc:title xml:lang="fr">Contribution à l'intégration d'une sonde aiguille haute résolution de spectroscopie localisée par résonance magnétique nucléaire</dc:title>
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<dc:subject xml:lang="fr">Sonde RMN</dc:subject>
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<dc:subject xml:lang="fr">Maladies neurodégénératives</dc:subject>
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<dc:subject xml:lang="fr">Microélectronique</dc:subject>
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<dcterms:abstract xml:lang="fr">La spectroscopie par Résonance Magnétique Nucléaire est une technique d’analyse de choix pour l’identification et la quantification d’espèce chimique biologique : les métabolites. Elle souffre cependant d’une faible sensibilité intrinsèque ce qui rend difficile son utilisation pour de très faible volume de mesure. Nous proposons dans ce projet de thèse de remédier à cette limite en adaptant la proximité et la taille de l’élément de mesure au volume que l’on souhaite analyser, en l’occurrence il s’agit de pouvoir monitorer l’évolution, à l’échelle d’une centaine de neurones, de biomarqueurs pour comprendre les stades précoces du développement de maladies neurodégénératives sur des modèles animaux. Ce travail de thèse étudie les besoins en termes de conditionnement du signal RMN issu d’une microbobine aiguille développée pour l’implantation in-vivo sur des rats, ainsi que la faisabilité de mener des expérimentations de spectroscopie haute résolution.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Nuclear Magnetic Resonance spectroscopy is an analytical technique of choice for the identification and quantification of biologic chemical species: the metabolites. However, it suffers from low intrinsic sensitivity, which makes it difficult to use for very small measurement volumes. In this thesis project we propose, as a solution to this limitation, to adapt the proximity and the size of the probe to the volume of interest that we want to analyze. This volume, corresponding to the scale of a hundred of neurons will allows us to monitor the evolution of biomarkers to understand the early stages of development of neurodegenerative diseases in animal models. This thesis work studies the needs in terms of signal processing of the NMR signal coming from a microcoil needle developed for in-vivo implantation in rats, as well as the feasibility of conducting high-resolution spectroscopy experiments.</dcterms:abstract>
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