Adaptive placement of the pseudo-boundaries improves the conditioning of the inverse problem
CHAMORRO-SERVENT, Judit
Institut de Mathématiques de Bordeaux [IMB]
IHU-LIRYC
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
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]
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]
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IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
CHAMORRO-SERVENT, Judit
Institut de Mathématiques de Bordeaux [IMB]
IHU-LIRYC
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
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]
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]
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
DALLET, Corentin
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
COUDIÈRE, Yves
IHU-LIRYC
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
Institut de Mathématiques de Bordeaux [IMB]
IHU-LIRYC
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
Institut de Mathématiques de Bordeaux [IMB]
DUBOIS, Rémi
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
< Reduce
IHU-LIRYC
Centre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
Institut National de la Santé et de la Recherche Médicale [INSERM]
Language
en
Communication dans un congrès
This item was published in
Computing in Cardiology, 2016-09-11, Vancouver. 2016-09-08, vol. 43, n° 705-708
English Abstract
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) ...Read more >
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.Read less <
English Keywords
ill-posednes
virtual sources
method of fundamental solution
electrographic imaging
regularization
ANR Project
L'Institut de Rythmologie et modélisation Cardiaque - ANR-10-IAHU-0004
Origin
Hal imported