Pseudo-conductivity inhomogeneous head model for computation of EEG

Peng Wen, Fangpo He, Karl Sammut

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Human head models for the forward computation of EEG using FEM require a large set of elements to represent the head geometry accurately. Anatomically, the electrical property of each element is different, even though they may represent the same type of tissue (white matter, grey matter, etc.). Since it is impossible to obtain the electrical properties of the cranial tissues for every element in the head model, most algorithms which claim to deal with inhomogeneity can, in reality, only implement the computation for the homogeneous case. This paper presents a new numerical approach which can more precisely model the head by using a set of pseudo conductivity values for the computation of the inhomogeneous case. This set of values are extrapolated from the limited amount of real conductivity values which are available in the literature. Simulation studies, based on both this proposed approach and the homogeneous approach which utilizes mean-valued conductivities, are performed. The studies reveal that the computation results for the potential distribution on the surface of the scalp, obtained using both approaches, are significantly different.

Original languageEnglish
Title of host publication Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2167-2170
Number of pages4
ISBN (Print)0-7803-5164-9
DOIs
Publication statusPublished - 1998
EventProceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6) - Hong Kong, China
Duration: 29 Oct 19981 Nov 1998

Publication series

NameAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume4
ISSN (Print)0589-1019

Conference

ConferenceProceedings of the 1998 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 4 (of 6)
CityHong Kong, China
Period29/10/981/11/98

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