From medical images to computational meshes

نویسندگان

  • Pascal Frey
  • Jacques Louis
  • LIONS
چکیده

Numerical simulations take a bigger importance in medical activity as they allow to obtain information non-invasively. To take into account individual variability, we propose numerical simulations in geometries reconstructed from medical images. We present the necessary treatment of images of diseased vessels, to provide a computational mesh of an anatomical model of the subject. First a faceted surface is extracted from the images. Then this surface is transformed into a geometrical model to be finally remeshed for a finite element use. Résumé. Les simulations numériques ayant trait au biomédical prennent de plus en plus d’importance car elles permettent d’obtenir de nouvelles informations impossibles à mesurer de manière non-invasive chez les patients. Pour prendre en compte la variabilité inter-sujet, nous proposons des simulations numériques dans des géométries reconstruites à partir de l’imagerie médicale. Dans la suite, nous présentons le traitement d’images de vaisseaux malades, nécessaire à l’obtention d’un maillage de calcul du modèle anatomique du patient. En premier lieu, on extrait des images un ensemble de facettes représentant une surface. Puis cette surface est transformée en un modèle géométrique qui est finalement remaillé pour satisfaire les contraintes d’un maillage éléments finis.

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تاریخ انتشار 2003