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Adaptive placement of the pseudo-boundaries improves the conditioning of the inverse problem

hal.structure.identifierInstitut de Mathématiques de Bordeaux [IMB]
hal.structure.identifierIHU-LIRYC
hal.structure.identifierModélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
dc.contributor.authorCHAMORRO-SERVENT, Judit
hal.structure.identifierInstitut National de la Santé et de la Recherche Médicale [INSERM]
hal.structure.identifierIHU-LIRYC
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
dc.contributor.authorBEAR, Laura
hal.structure.identifierIHU-LIRYC
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
hal.structure.identifierInstitut National de la Santé et de la Recherche Médicale [INSERM]
dc.contributor.authorDUCHATEAU, Josselin
hal.structure.identifierIHU-LIRYC
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
hal.structure.identifierInstitut National de la Santé et de la Recherche Médicale [INSERM]
dc.contributor.authorDALLET, Corentin
hal.structure.identifierIHU-LIRYC
hal.structure.identifierModélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
hal.structure.identifierInstitut de Mathématiques de Bordeaux [IMB]
dc.contributor.authorCOUDIÈRE, Yves
hal.structure.identifierIHU-LIRYC
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
hal.structure.identifierInstitut National de la Santé et de la Recherche Médicale [INSERM]
dc.contributor.authorDUBOIS, Rémi
dc.date.accessioned2024-04-04T03:13:31Z
dc.date.available2024-04-04T03:13:31Z
dc.date.issued2016-09-08
dc.date.conference2016-09-11
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/193954
dc.description.abstractEnMeshing 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.
dc.description.sponsorshipL'Institut de Rythmologie et modélisation Cardiaque - ANR-10-IAHU-0004
dc.language.isoen
dc.subject.enill-posednes
dc.subject.envirtual sources
dc.subject.enmethod of fundamental solution
dc.subject.enelectrographic imaging
dc.subject.enregularization
dc.title.enAdaptive placement of the pseudo-boundaries improves the conditioning of the inverse problem
dc.typeCommunication dans un congrès
dc.subject.halSciences de l'ingénieur [physics]
dc.subject.halMathématiques [math]
bordeaux.volume43
bordeaux.hal.laboratoriesInstitut de Mathématiques de Bordeaux (IMB) - UMR 5251*
bordeaux.issue705-708
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.conference.titleComputing in Cardiology
bordeaux.countryCA
bordeaux.conference.cityVancouver
bordeaux.peerReviewedoui
hal.identifierhal-01379271
hal.version1
hal.invitednon
hal.proceedingsnon
hal.conference.end2016-09-14
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01379271v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2016-09-08&rft.volume=43&rft.issue=705-708&rft.au=CHAMORRO-SERVENT,%20Judit&BEAR,%20Laura&DUCHATEAU,%20Josselin&DALLET,%20Corentin&COUDI%C3%88RE,%20Yves&rft.genre=unknown


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