CHAMORRO-SERVENT, Judit; BEAR, Laura; DUCHATEAU, Josselin; DALLET, Corentin; COUDIÈRE, Yves; DUBOIS, Rémi

Métadonnées

Licence d’utilisation du document

CHAMORRO-SERVENT, Judit
Institut de Mathématiques de Bordeaux [IMB]
IHU-LIRYC
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]

BEAR, Laura
Institut National de la Santé et de la Recherche Médicale [INSERM]
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]

DUCHATEAU, Josselin
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]

Langue

Communication dans un congrès

Ce document a été publié dans

Computing in Cardiology, 2016-09-11, Vancouver. 2016-09-08, vol. 43, n° 705-708

Résumé en anglais

Meshing the heart and measurement surfaces can be time consuming, especially when dealing with complicated geometries or cardiac motion. To overcome this, a meshless method based on the method of fundamental solutions (MFS) has been adapted to non-invasive electrocardiographic imaging (ECGI). In the MFS, potentials are expressed as a summation over a discrete set of virtual point sources placed outside of the domain of interest (named 'pseudo-boundary'). It is well-known that optimal placement of the pseudo-boundary can improve the efficacy of the MFS. Despite this, there have been no attempts to optimize their placement in the ECGI problem as far as we are aware. In the standard MFS, the sources are placed in two pseudo-boundaries constructed by inflating and deflating the heart and torso surfaces with respect to the geometric center of the heart. However, for some heart-torso geometries, this geometric center is a poor reference. We here show that adaptive placement of the pseudo-boundaries (depending on the distance between the torso electrodes and the nearest heart locations) improves the conditioning of the inverse problem, making it less sensitive to the regularization process.< Réduire

Mots clés en anglais

ill-posednes

virtual sources

method of fundamental solution

electrographic imaging

regularization

URI

https://oskar-bordeaux.fr/handle/20.500.12278/193954

Project ANR

L'Institut de Rythmologie et modélisation Cardiaque - ANR-10-IAHU-0004

Origine

Importé de hal

Unités de recherche

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251