標題: Maximum contrast beamformer for electromagnetic mapping of brain activity
作者: Chen, Yong-Sheng
Cheng, Chih-Yu
Hsieh, Jen-Chuen
Chen, Li-Fen
資訊工程學系
Department of Computer Science
關鍵字: EEG;electromagnetic brain mapping;maximum contrast beamformer;MEG
公開日期: 1-Sep-2006
摘要: Beamforming technique can be applied to map the neuronal activities from magnetoencephalographic/electroencephalographic (MEG/EEG) recordings. One of the major difficulties of the scalar-type MEG/EEG beamformer is the determination of accurate dipole orientation, which is essential to an effective spatial filter. This paper presents a new beamforming technique which exploits a maximum contrast criterion to maximize the ratio of the neuronal activity estimated in a specified active state to the activity estimated in a control state. This criterion leads to a closed-form solution of the dipole orientation. Experiments with simulation, phantom, and finger-lifting data clearly demonstrate the effectiveness, efficiency, and accuracy of the proposed method.
URI: http://dx.doi.org/10.1109/TBME.2006.878115
http://hdl.handle.net/11536/11815
ISSN: 0018-9294
DOI: 10.1109/TBME.2006.878115
期刊: IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
Volume: 53
Issue: 9
起始頁: 1765
結束頁: 1774
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