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     <dc:title xml:lang="en">Diagnosis and quantification of diffuse liver diseases by MRI : steatosis, iron overload and fibrosis</dc:title>
     <dcterms:alternative xml:lang="fr"> Diagnostic et quantification des hépatopathies diffuses par IRM : stéatose, hépatosidérose et fibrose</dcterms:alternative>
     <dc:subject xml:lang="fr">Foie</dc:subject><dc:subject xml:lang="fr">IRM quantitative</dc:subject><dc:subject xml:lang="fr">stéatose</dc:subject><dc:subject xml:lang="fr">surcharge ferrique</dc:subject><dc:subject xml:lang="fr">fibrose hépatique</dc:subject>
     <dc:subject xml:lang="en">Liver</dc:subject><dc:subject xml:lang="en">quantitative MRI</dc:subject><dc:subject xml:lang="en">steatosis</dc:subject><dc:subject xml:lang="en">liver iron overload</dc:subject><dc:subject xml:lang="en">liver fibrosis</dc:subject><tef:sujetRameau><tef:vedetteRameauNomCommun>
						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027256537">Foie</tef:elementdEntree><tef:subdivision autoriteSource="Sudoc" type="subdivisionDeSujet" autoriteExterne="033922470">Teneur en fer</tef:subdivision>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027256537">Foie</tef:elementdEntree><tef:subdivision autoriteSource="Sudoc" type="subdivisionDeSujet" autoriteExterne="03144007X">Fibrose</tef:subdivision>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="028921011">Imagerie par résonance magnétique</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027824594">Stéatose hépatique</tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Les hépatopathies diffuses représentent un problème de santé mondial majeur, avec des complications importantes, une morbidité et une mortalité élevées. Cette thèse se concentre sur la stéatose, la surcharge en fer hépatique et la fibrose hépatique. Pour ces pathologies, la quantification précise de la graisse hépatique, du fer et de la fibrose est cruciale pour le diagnostic, l'évaluation pronostique, la gestion du traitement et le suivi. Compte tenu des limites de la biopsie hépatique, des biomarqueurs non invasifs basés sur l'IRM tels que PDFF, R2* et la rigidité ont été rapidement développés. La thèse est structurée en trois chapitres, correspondant à la quantification de la graisse, du fer et de la fibrose hépatiques. Chaque chapitre inclut une étude associée. L’annexe présente le logiciel gratuit MRQuantif, qui permet la quantification de la graisse et du fer. Dans l'ensemble, l'IRM quantitative pour la mesure de la graisse, du fer et de la fibrose hépatiques a été largement validée pour son caractère non invasif, sa précision et sa reproductibilité.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">Diffuse liver diseases represent a major global health concern, with significant complications, high morbidity, and mortality rates. This thesis focuses on steatosis, liver iron overload, and liver fibrosis. For these diseases, accurate quantification of liver fat, iron, and fibrosis is crucial for diagnosis, prognostic assessment, treatment management, and follow-up. Given the limitations of liver biopsy, non-invasive MRI-based biomarkers such as PDFF, R2*, and stiffness have been rapidly developed. The thesis is structured into three chapters, corresponding to the MRI quantification of liver fat, iron, and fibrosis. Each chapter is followed by a research study. The appendix introduces the free MRQuantif software for the quantification of liver fat and iron. Overall, quantitative MRI for measuring liver fat, iron, and fibrosis has been extensively validated for its non-invasive nature, accuracy, and reproducibility.</dcterms:abstract>
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