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     <dc:title xml:lang="fr">Etude de la mobilité des corps étrangers métalliques oculaires et péri oculaires en IRM utilisant un modèle ex-vivo : méthodologie : choix d’un modèle fiable et reproductible</dc:title>
     <dcterms:alternative xml:lang="en">Mobility’s study of ocular and periocular metallic foreign bodies in MRI using an ex-vivo model: methodology : reliable and reproducible model choice</dcterms:alternative>
     <dc:subject xml:lang="fr">corps étranger métallique</dc:subject><dc:subject xml:lang="fr">intra orbitaire</dc:subject><dc:subject xml:lang="fr">intra palpebral</dc:subject><dc:subject xml:lang="fr">intra vitréen</dc:subject><dc:subject xml:lang="fr">supra choroidien</dc:subject><dc:subject xml:lang="fr">IRM</dc:subject><dc:subject xml:lang="fr">champs magnétique</dc:subject>
     <dc:subject xml:lang="en">metallic foreign body</dc:subject><dc:subject xml:lang="en">intra palpebral intra vitreous</dc:subject><dc:subject xml:lang="en">intra orbital</dc:subject><dc:subject xml:lang="en">supra coroidien</dc:subject><dc:subject xml:lang="en">MRI</dc:subject><dc:subject xml:lang="en">magnetic field</dc:subject>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="027314901">Oeil</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="03060124X">‎Matériaux ferromagnétiques</tef:elementdEntree>
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						<tef:elementdEntree autoriteSource="Sudoc" autoriteExterne="028921011">Imagerie par résonance magnétique </tef:elementdEntree>
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     <dcterms:abstract xml:lang="fr">Le champ magnétique en imagerie par résonance magnétique (IRM) est presque 30 000 fois plus puissant que le champ magnétique terrestre. Un corps étranger ferromagnétique lors d'une exploration IRM peut entraîner des lésions tissulaires dues aux mouvements et à la chaleur, en particulier à l'intérieur et autour des yeux. Les corps étrangers ferromagnétiques situés en intra- oculaire, intra-palpébral ou dans la graisse intra-orbitaire sont donc interdits à l'IRM. Nous avons mis au point un modèle ex vivo d'orbites de porcs pour étudier les mouvements intra-orbitaux de corps étrangers ferromagnétiques après un examen IRM de 1,5 Tesla (T). L'analyse des mouvements a été évaluée à l'aide d'un scanner tomodensitométrique. La bille ferromagnétique intra-vitréenne de 4 mm s'est déplacée de 14,0 mm, la bille supra-choroïdale de 4 mm s'est déplacée de 16,8 mm, la bille de 4 mm située dans la graisse intra-orbitaire de 4,3 mm et l'intra-palpébrale de 2,0 mm. Nous avons conclu que notre modèle est fiable, reproductible et facile à mettre en place pour étudier le comportement des IFMFB dans un modèle ex vivo.</dcterms:abstract>
     <dcterms:abstract xml:lang="en">Magnetic field in magnetic resonance imaging (MRI) is almost 30,000 times stronger than earth magnetic field. Ferromagnetic foreign body during MRI exploration can lead to tissue injuries due to movements and heating, especially in and around eyes locations. Ferromagnetic foreign bodies located in intra ocular, eyelids and intra-orbital fat are thus prohibited from MRI scanning. We developed a porcine head animal ex vivo model to study intra orbital ferromagnetic foreign bodies (IFMFB) movements after 1.5 Tesla (T) MRI examination. Movement analysis was assessed using CT scanner. The 4-mm intra-vitreous ferromagnetic ball moved 14.0 mm, the 4- mm supra-choroïdal ball moved 16.8mm, the 4-mm intra-orbital fat ball moved 4.3mm and the intra-palpebral 2.0 mm. We concluded that our model is reliable, reproducible and easily set up to study IFMFB behavior into ex vivo model.</dcterms:abstract>
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