{"id":15820,"date":"2017-12-19T10:20:58","date_gmt":"2017-12-19T09:20:58","guid":{"rendered":"https:\/\/www.chu-poitiers.fr\/?p=15820"},"modified":"2021-04-20T18:06:09","modified_gmt":"2021-04-20T16:06:09","slug":"dactim-mis-les-maths-au-coeur-de-linnovation-en-imagerie-medicale","status":"publish","type":"post","link":"https:\/\/www.chu-poitiers.fr\/en\/dactim-mis-les-maths-au-coeur-de-linnovation-en-imagerie-medicale\/","title":{"rendered":"Dactim-MIS : les maths au c\u0153ur de l\u2019innovation en imagerie m\u00e9dicale"},"content":{"rendered":"<p>&#8220;L\u2019axiome de Dactim-MIS est l\u2019int\u00e9gration de donn\u00e9es de l\u2019imagerie humaine clinique \u00e0 des mod\u00e8les biomath\u00e9matiques multiparam\u00e9triques permettant de reproduire le fonctionnement biochimique d\u2019un organe. Nous sommes, en France, la seule \u00e9quipe d\u2019imagerie \u00e0 travailler sur l\u2019imagerie m\u00e9tabolique par r\u00e9sonance magn\u00e9tique multi-noyaux et \u00e0 disposer d\u2019une plateforme IRM 3 Tesla per-op\u00e9ratoire&#8221;, r\u00e9sume le Pr R\u00e9my Guillevin, chef adjoint du p\u00f4le imagerie du CHU de Poitiers, \u00e0 la t\u00eate de l\u2019\u00e9quipe de recherche Dactim-MIS avec le Pr Alain Miranville, math\u00e9maticien.<\/p>\n<p>Cr\u00e9\u00e9e en juin 2016 et bas\u00e9e au centre cardiovasculaire, l\u2019\u00e9quipe Dactim-MIS fait partie du laboratoire de math\u00e9matiques et applications (LMA), laboratoire CNRS de l\u2019Universit\u00e9 de Poitiers. Compos\u00e9e de vingt-trois chercheurs, quatorze permanents, trois post-docs et six doctorants, l\u2019\u00e9quipe Dactim-MIS regroupe des math\u00e9maticiens, des physiciens de l\u2019image de l\u2019Universit\u00e9 de Poitiers et des m\u00e9decins imageurs (radiologie et m\u00e9decine nucl\u00e9aire) du CHU. &#8220;Nos recherches ont plusieurs domaines d\u2019application, pour l\u2019instant majoritairement centr\u00e9s sur le cerveau : la neuro-oncologie mais aussi les maladies neurod\u00e9g\u00e9n\u00e9ratives, inflammatoires et psychiatriques.&#8221;<\/p>\n<p><strong>Pr\u00e9dire le d\u00e9veloppement de la tumeur et sa r\u00e9ponse aux th\u00e9rapeutiques <\/strong><br \/>\n S\u2019appuyant sur la mod\u00e9lisation math\u00e9matique, le premier axe de recherche de Dactim-MIS porte sur la compr\u00e9hension des ph\u00e9nom\u00e8nes de croissance tumorale du cerveau. Les param\u00e8tres issus de l\u2019IRM (flux sanguin, quantification des m\u00e9tabolites, lactate, ATP, choline, etc.) servent \u00e0 alimenter des mod\u00e8les math\u00e9matiques dans le but de pr\u00e9dire le fonctionnement et, par extension, le d\u00e9veloppement de la tumeur mais aussi la r\u00e9ponse th\u00e9rapeutique \u00e0 un traitement donn\u00e9. &#8220;Il s\u2019agit en effet de d\u00e9finir des mod\u00e8les math\u00e9matiques bien adapt\u00e9s, c\u2019est-\u00e0-dire simples mais rendant compte de la dynamique souhait\u00e9e afin de comprendre au mieux les \u00e9changes d\u2019int\u00e9r\u00eat entre agents \u2013 cellules ou organes \u2013 et ainsi l\u2019\u00e9volution de certains m\u00e9tabolites au cours du temps. Une fois ces mod\u00e8les mis en place et les param\u00e8tres estim\u00e9s gr\u00e2ce aux donn\u00e9es issues de la SRM, il est possible de pr\u00e9dire l\u2019\u00e9volution des m\u00e9tabolites au sein d\u2019un gliome. Nous esp\u00e9rons bient\u00f4t pouvoir, gr\u00e2ce \u00e0 ces mod\u00e8les, proposer des strat\u00e9gies th\u00e9rapeutiques adapt\u00e9es &#8220;, explique Ang\u00e9lique Perrillat, doctorante en biomath\u00e9matiques.<\/p>\n<p>Deuxi\u00e8me axe de recherche du laboratoire Dactim-MIS : la visualisation et l\u2019aide \u00e0 la d\u00e9cision pour la neuro-navigation per-op\u00e9ratoire \u00e0 travers le recalage d\u2019images IRM. Avant l\u2019op\u00e9ration, un bilan tumoral complet est effectu\u00e9. Gr\u00e2ce \u00e0 l\u2019IRM 3 Tesla dont dispose le centre cardiovasculaire, pendant l\u2019op\u00e9ration, une nouvelle s\u00e9rie d\u2019images peut \u00eatre acquise permettant une actualisation des zones tumorales restantes \u00e0 l\u2019issue de la premi\u00e8re partie de l\u2019op\u00e9ration.<\/p>\n<p>&#8220;Nous essayons donc de concevoir une m\u00e9thode de recalage de ces images et des donn\u00e9es c\u00e9r\u00e9brales afin d\u2019am\u00e9liorer l\u2019outil de neuro-navigation c\u00e9r\u00e9brale utilis\u00e9 par les chirurgiens. Cette approche permet d\u2019obtenir, en plus des donn\u00e9es anatomiques, des param\u00e8tres m\u00e9taboliques, perfusionnels et fonctionnels, d\u00e9veloppe Mathieu Naudin, doctorant en informatique. Cela passe par l\u2019\u00e9laboration de mod\u00e8les math\u00e9matiques pour la compr\u00e9hension de la d\u00e9formation du cerveau pendant l\u2019op\u00e9ration. Les techniques de recalage utilis\u00e9es doivent apporter une information la plus pr\u00e9cise possible malgr\u00e9 des contraintes importantes en temps de calcul.&#8221; Ces travaux contribueront donc \u00e0 une pr\u00e9cision et une efficacit\u00e9 accrue dans l\u2019ablation des tumeurs c\u00e9r\u00e9brales. L\u2019objectif de Dactim-MIS est d\u2019augmenter le niveau d\u2019information disponible au bloc op\u00e9ratoire.<\/p>\n<p>Autre axe de recherche : la transplantation. &#8220;Un projet de recherche (Mega-Q2OL) en cours d\u2019\u00e9laboration vise \u00e0 caract\u00e9riser au mieux le m\u00e9tabolisme d\u2019un organe avant greffe sur un tiers, dans le but de pr\u00e9dire le comportement post-greffe. Les travaux portent aujourd\u2019hui sur le rein et concerneront \u00e9galement, \u00e0 moyen terme, la greffe cardiaque&#8221;, compl\u00e8te le Pr Guillevin, rappelant que l\u2019ensemble de la th\u00e9matique de Dactim-MIS s\u2019inscrit dans le livre blanc du CHU, actuellement en cours d\u2019\u00e9laboration.<\/p>\n<p><strong>Une voie d\u2019excellence<\/strong><br \/>\n &#8220;Notre travail ne se limite pas \u00e0 l\u2019\u00e9laboration de statistiques : nous cr\u00e9ons des mod\u00e8les dits r\u00e9alistes, permettant de d\u00e9crire les fluctuations et le comportement des syst\u00e8mes biologiques qui constituent les organes et, par extension, le corps humain. Nous pr\u00e9parons l\u2019exploitation de l\u2019imagerie de demain qui est d\u2019aller regarder au plus pr\u00e8s du fonctionnement du m\u00e9tabolisme. L\u2019organe est regard\u00e9 comme un objet multiparam\u00e9trique et dynamique. Le r\u00f4le de Dactim-MIS est de r\u00e9aliser la convergence de plusieurs sp\u00e9cialit\u00e9s : la g\u00e9nomique, la biochimie, la pathologie, les math\u00e9matiques et la physique de l\u2019image&#8221;, souligne le Pr Guillevin.<\/p>\n<p>Le d\u00e9veloppement attendu de la plateforme d\u2019imagerie de recherche (imagerie isotopique et remnologique) permettra de conforter ce savoir-faire scientifique, &#8220;cette voie d\u2019excellence&#8221;, et d\u2019en exploiter toutes les potentialit\u00e9s : &#8220;La performance, la finesse d\u2019examen des structures et le nombre d\u2019informations accessibles seront fortement augment\u00e9s.&#8221;<\/p>\n<p>&#8220;Transversale et dynamique&#8221;, l\u2019\u00e9quipe de chercheurs a d\u00e9j\u00e0 produit plus de 36 publications depuis sa cr\u00e9ation. Un axe innovant en France, unique en r\u00e9gion Nouvelle-Aquitaine, b\u00e9n\u00e9ficiant d\u2019ores et d\u00e9j\u00e0 d\u2019une reconnaissance internationale. &#8220;Dactim-MIS met la recherche fondamentale en lien direct avec les patients&#8221;, conclut le Pr Guillevin.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019\u00e9quipe Dactim-MIS (Data Analysis and Computation Through Imaging and Modeling-Maths Images Sant\u00e9), int\u00e9gr\u00e9e au laboratoire CNRS LMA 7348 de\u2026","protected":false},"author":1,"featured_media":15821,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41,1],"tags":[],"class_list":["post-15820","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recherche","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dactim-MIS : les maths au c\u0153ur de l\u2019innovation en imagerie m\u00e9dicale - Site du CHU de Poitiers<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.chu-poitiers.fr\/dactim-mis-les-maths-au-coeur-de-linnovation-en-imagerie-medicale\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dactim-MIS : les maths au c\u0153ur de l\u2019innovation en imagerie m\u00e9dicale - Site du CHU de Poitiers\" \/>\n<meta property=\"og:description\" content=\"L\u2019\u00e9quipe Dactim-MIS (Data Analysis and Computation Through Imaging and Modeling-Maths Images Sant\u00e9), int\u00e9gr\u00e9e au laboratoire CNRS LMA 7348 de l\u2019Universit\u00e9 de Poitiers, est situ\u00e9e au centre cardio-vasculaire du CHU de Poitiers. 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