| General bounds for electrode mislocation on the EEG inverse problem. | |
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MedLine Citation:
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PMID: 20599288 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We analyze the effect of electrode mislocation on the electroencephalography (EEG) inverse problem using the Cramér-Rao bound (CRB) for single dipolar source parameters. We adopt a realistic head shape model, and solve the forward problem using the Boundary Element Method; the use of the CRB allows us to obtain general results which do not depend on the algorithm used for solving the inverse problem. We consider two possible causes for the electrode mislocation, errors in the measurement of the electrode positions and an imperfect registration between the electrodes and the scalp surfaces. For 120 electrodes placed in the scalp according to the 10-20 standard, and errors on the electrode location with a standard deviation of 5mm, the lower bound on the standard deviation in the source depth estimation is approximately 1mm in the worst case. Therefore, we conclude that errors in the electrode location may be tolerated since their effect on the EEG inverse problem are negligible from a practical point of view. |
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Authors:
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L Beltrachini; N von Ellenrieder; C H Muravchik |
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Publication Detail:
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Type: Journal Article Date: 2010-07-05 |
Journal Detail:
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Title: Computer methods and programs in biomedicine Volume: 103 ISSN: 1872-7565 ISO Abbreviation: Comput Methods Programs Biomed Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8506513 Medline TA: Comput Methods Programs Biomed Country: Ireland |
Other Details:
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Languages: eng Pagination: 1-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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LEICI, Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 1 y 47, B1900TAG La Plata, Buenos Aires, Argentina. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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