Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling

Alexandra Koulouri; Ville Rimpiläinen

doi:10.1007/978-3-030-64610-3_114

Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

2 Citations (SciVal)

Abstract

The electroencephalography (EEG) source imaging problem is very sensitive to the electrical modelling of the skull of the patient under examination. Unfortunately, the currently available EEG devices and their embedded software do not take this into account; instead, it is common to use a literature-based skull conductivity parameter. In this paper, we propose a statistical method based on the Bayesian approximation error approach to compensate for source imaging errors due to the unknown skull conductivity and, simultaneously, to compute a low-order estimate for the actual skull conductivity value. By using simulated EEG data that corresponds to focal source activity, we demonstrate the potential of the method to reconstruct the underlying focal sources and low-order errors induced by the unknown skull conductivity. Subsequently, the estimated errors are used to approximate the skull conductivity. The results indicate clear improvements in the source localization accuracy and feasible skull conductivity estimates.

Original language	English
Title of host publication	8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020
Editors	Tomaz Jarm, Aleksandra Cvetkoska, Samo Mahnič-Kalamiza, Damijan Miklavcic
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	1019-1027
Number of pages	9
ISBN (Print)	9783030646097
DOIs	https://doi.org/10.1007/978-3-030-64610-3_114
Publication status	Published - 1 Jan 2021
Externally published	Yes
Event	8th European Medical and Biological Engineering Conference, EMBEC 2020 - Portorož, Slovenia Duration: 29 Nov 2020 → 3 Dec 2020

Publication series

Name	IFMBE Proceedings
Volume	80
ISSN (Print)	1680-0737
ISSN (Electronic)	1433-9277

Conference

Conference	8th European Medical and Biological Engineering Conference, EMBEC 2020
Country/Territory	Slovenia
City	Portorož
Period	29/11/20 → 3/12/20

Bibliographical note

Publisher Copyright:
© 2021, Springer Nature Switzerland AG.

Keywords

Bayesian modelling
Electroencephalography
Inverse problem
Skull conductivity
Source imaging

ASJC Scopus subject areas

Bioengineering
Biomedical Engineering

Access to Document

10.1007/978-3-030-64610-3_114

https://arxiv.org/abs/2002.00066

Cite this

Koulouri, A., & Rimpiläinen, V. (2021). Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling. In T. Jarm, A. Cvetkoska, S. Mahnič-Kalamiza, & D. Miklavcic (Eds.), 8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020 (pp. 1019-1027). (IFMBE Proceedings; Vol. 80). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-030-64610-3_114

Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling. / Koulouri, Alexandra; Rimpiläinen, Ville.
8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020. ed. / Tomaz Jarm; Aleksandra Cvetkoska; Samo Mahnič-Kalamiza; Damijan Miklavcic. Springer Science and Business Media Deutschland GmbH, 2021. p. 1019-1027 (IFMBE Proceedings; Vol. 80).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Koulouri, A & Rimpiläinen, V 2021, Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling. in T Jarm, A Cvetkoska, S Mahnič-Kalamiza & D Miklavcic (eds), 8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020. IFMBE Proceedings, vol. 80, Springer Science and Business Media Deutschland GmbH, pp. 1019-1027, 8th European Medical and Biological Engineering Conference, EMBEC 2020, Portorož, Slovenia, 29/11/20. https://doi.org/10.1007/978-3-030-64610-3_114

Koulouri A, Rimpiläinen V. Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling. In Jarm T, Cvetkoska A, Mahnič-Kalamiza S, Miklavcic D, editors, 8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020. Springer Science and Business Media Deutschland GmbH. 2021. p. 1019-1027. (IFMBE Proceedings). Epub 2020 Nov 30. doi: 10.1007/978-3-030-64610-3_114

Koulouri, Alexandra ; Rimpiläinen, Ville. / Simultaneous Skull Conductivity and Focal Source Imaging from EEG Recordings with the Help of Bayesian Uncertainty Modelling. 8th European Medical and Biological Engineering Conference - Proceedings of the EMBEC 2020. editor / Tomaz Jarm ; Aleksandra Cvetkoska ; Samo Mahnič-Kalamiza ; Damijan Miklavcic. Springer Science and Business Media Deutschland GmbH, 2021. pp. 1019-1027 (IFMBE Proceedings).

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