TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling

Tutkimustuotosvertaisarvioitu

Standard

Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling. / Pursiainen, Sampsa; Bauer, Martin; Vorwerk, Johannes; Köstler, Harald; Wolters, Carsten H.

julkaisussa: IEEE Transactions on Biomedical Engineering, Vuosikerta 62, Nro 11, 11.2015, s. 2648-2656.

Tutkimustuotosvertaisarvioitu

Harvard

Pursiainen, S, Bauer, M, Vorwerk, J, Köstler, H & Wolters, CH 2015, 'Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling', IEEE Transactions on Biomedical Engineering, Vuosikerta. 62, Nro 11, Sivut 2648-2656. https://doi.org/10.1109/TBME.2015.2439282

APA

Pursiainen, S., Bauer, M., Vorwerk, J., Köstler, H., & Wolters, C. H. (2015). Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling. IEEE Transactions on Biomedical Engineering, 62(11), 2648-2656. https://doi.org/10.1109/TBME.2015.2439282

Vancouver

Pursiainen S, Bauer M, Vorwerk J, Köstler H, Wolters CH. Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling. IEEE Transactions on Biomedical Engineering. 2015 marras;62(11):2648-2656. https://doi.org/10.1109/TBME.2015.2439282

Author

Pursiainen, Sampsa ; Bauer, Martin ; Vorwerk, Johannes ; Köstler, Harald ; Wolters, Carsten H. / Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling. Julkaisussa: IEEE Transactions on Biomedical Engineering. 2015 ; Vuosikerta 62, Nro 11. Sivut 2648-2656.

Bibtex - Lataa

@article{fa0f237bf6634b199c9dba751128c194,
title = "Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling",
abstract = "This study concentrates on finite element method (FEM)based electroencephalography (EEG) forward simulation in which theelectric potential evoked by neural activity in the brain is to be calculatedat the surface of the head. The main advantage of the FEM is that it allowsrealistic modeling of tissue conductivity inhomogeneity. However, it is notstraightforward to apply the classical model of a dipolar source with theFEM, due to its strong singularity and the resulting irregularity. The focusof this study is on comparing different methods to cope with this problem.In particular, we evaluate the accuracy of Whitney (Raviart-Thomas) typedipole-like source currents compared to two reference dipole modelingmethods: the St. Venant and partial integration approach. Commonto all these methods is that they enable direct approximation of thepotential field utilizing linear basis functions. In the present context,Whitney elements are particularly interesting, as they provide a simplemeans to model a divergence-conforming primary current vector fieldsatisfying the square integrability condition. Our results show that aWhitney type source model can provide simulation accuracy comparableto the present reference methods. It can lead to superior accuracy underoptimized conditions with respect to both source location and orientationin a tetrahedral mesh. For random source orientations, the St. Venantapproach turns out to be the method of choice over the interpolatedversion of the Whitney model. The overall moderate differences obtainedsuggest that practical aspects, such as the focality, should be prioritizedwhen choosing a source model.",
author = "Sampsa Pursiainen and Martin Bauer and Johannes Vorwerk and Harald K{\"o}stler and Wolters, {Carsten H.}",
year = "2015",
month = "11",
doi = "10.1109/TBME.2015.2439282",
language = "English",
volume = "62",
pages = "2648--2656",
journal = "IEEE Transactions on Biomedical Engineering",
issn = "0018-9294",
publisher = "Institute of Electrical and Electronics Engineers",
number = "11",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Comparison Study for Whitney (Raviart-Thomas) Type Source Models in Finite Element Method Based EEG Forward Modeling

AU - Pursiainen, Sampsa

AU - Bauer, Martin

AU - Vorwerk, Johannes

AU - Köstler, Harald

AU - Wolters, Carsten H.

PY - 2015/11

Y1 - 2015/11

N2 - This study concentrates on finite element method (FEM)based electroencephalography (EEG) forward simulation in which theelectric potential evoked by neural activity in the brain is to be calculatedat the surface of the head. The main advantage of the FEM is that it allowsrealistic modeling of tissue conductivity inhomogeneity. However, it is notstraightforward to apply the classical model of a dipolar source with theFEM, due to its strong singularity and the resulting irregularity. The focusof this study is on comparing different methods to cope with this problem.In particular, we evaluate the accuracy of Whitney (Raviart-Thomas) typedipole-like source currents compared to two reference dipole modelingmethods: the St. Venant and partial integration approach. Commonto all these methods is that they enable direct approximation of thepotential field utilizing linear basis functions. In the present context,Whitney elements are particularly interesting, as they provide a simplemeans to model a divergence-conforming primary current vector fieldsatisfying the square integrability condition. Our results show that aWhitney type source model can provide simulation accuracy comparableto the present reference methods. It can lead to superior accuracy underoptimized conditions with respect to both source location and orientationin a tetrahedral mesh. For random source orientations, the St. Venantapproach turns out to be the method of choice over the interpolatedversion of the Whitney model. The overall moderate differences obtainedsuggest that practical aspects, such as the focality, should be prioritizedwhen choosing a source model.

AB - This study concentrates on finite element method (FEM)based electroencephalography (EEG) forward simulation in which theelectric potential evoked by neural activity in the brain is to be calculatedat the surface of the head. The main advantage of the FEM is that it allowsrealistic modeling of tissue conductivity inhomogeneity. However, it is notstraightforward to apply the classical model of a dipolar source with theFEM, due to its strong singularity and the resulting irregularity. The focusof this study is on comparing different methods to cope with this problem.In particular, we evaluate the accuracy of Whitney (Raviart-Thomas) typedipole-like source currents compared to two reference dipole modelingmethods: the St. Venant and partial integration approach. Commonto all these methods is that they enable direct approximation of thepotential field utilizing linear basis functions. In the present context,Whitney elements are particularly interesting, as they provide a simplemeans to model a divergence-conforming primary current vector fieldsatisfying the square integrability condition. Our results show that aWhitney type source model can provide simulation accuracy comparableto the present reference methods. It can lead to superior accuracy underoptimized conditions with respect to both source location and orientationin a tetrahedral mesh. For random source orientations, the St. Venantapproach turns out to be the method of choice over the interpolatedversion of the Whitney model. The overall moderate differences obtainedsuggest that practical aspects, such as the focality, should be prioritizedwhen choosing a source model.

U2 - 10.1109/TBME.2015.2439282

DO - 10.1109/TBME.2015.2439282

M3 - Article

VL - 62

SP - 2648

EP - 2656

JO - IEEE Transactions on Biomedical Engineering

JF - IEEE Transactions on Biomedical Engineering

SN - 0018-9294

IS - 11

ER -