| The adjoint method for general EEG and MEG sensor-based lead field equations. | |
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MedLine Citation:
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PMID: 19075359 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Most of the methods for the inverse source problem in electroencephalography (EEG) and magnetoencephalography (MEG) use a lead field as an input. The lead field is the function which relates any source in the brain to its measurements at the sensors. For complex geometries, there is no analytical formula of the lead field. The common approach is to numerically compute the value of the lead field for a finite number of point sources (dipoles). There are several drawbacks: the model of the source space is fixed (a set of dipoles), and the computation can be expensive for as much as 10,000 dipoles. The common idea to bypass these problems is to compute the lead field from a sensor point of view. In this paper, we use the adjoint method to derive general EEG and MEG sensor-based lead field equations. Within a simple framework, we provide a complete review of the explicit lead field equations, and we are able to extend these equations to non-pointlike sensors. |
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Authors:
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Sylvain Vallaghé; Théodore Papadopoulo; Maureen Clerc |
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Publication Detail:
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Type: Journal Article Date: 2008-12-10 |
Journal Detail:
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Title: Physics in medicine and biology Volume: 54 ISSN: 0031-9155 ISO Abbreviation: Phys Med Biol Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2008-12-16 Completed Date: 2009-03-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401220 Medline TA: Phys Med Biol Country: England |
Other Details:
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Languages: eng Pagination: 135-47 Citation Subset: IM |
Affiliation:
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INRIA, Projet Odyssée, Sophia Antipolis, France. Sylvain.Vallaghe@sophia.inria.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Electroencephalography
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methods* Magnetoencephalography / methods* Models, Biological |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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