Enhancing accuracy in magneto-and electroencephalography focal source localization

Author

Im, Chang-Hwan ; An, Kwang-Ok ; Lee, Chany ; Jung, Hyun-Kyo ; Lee, Yong-Ho

Author_Institution

Department of Biomedical Engineering, Yonsei University, Wonju

Volume

42

Issue

4

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

1387

Lastpage

1390

Abstract

This paper investigates the origins of localization errors when cortically distributed source approach is applied to magnetoencephalography (MEG) and electroencephalography (EEG) focal source reconstruction problems. It was revealed from simulations that the errors mainly stem from 1)Asymmetric distribution of crosstalk and 2)Large noises at some time slices. To enhance the localization accuracy, a new algorithm named cortical surface scanning (CSS) method is presented. The proposed algorithm was applied to realistic simulations and more accurate and robust source estimates could be obtained

Keywords

electroencephalography; inverse problems; magnetoencephalography; medical signal processing; signal reconstruction; cortical surface scanning; electroencephalography; focal brain source localization; focal source localization; inverse problem; localization errors; magnetoencephalography; Biomedical engineering; Brain modeling; Cerebral cortex; Crosstalk; Electroencephalography; Humans; Inverse problems; Magnetoencephalography; Noise robustness; Surface reconstruction; Electroencephalography (EEG); focal brain source localization; inverse problem; magnetoencephalography (MEG);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.872033

Filename

1608474