Title :
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
fDate :
4/1/2006 12:00:00 AM
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.872033
