島根大学総合理工学部紀要.シリーズA

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島根大学総合理工学部紀要.シリーズA 39
2005-12-15 発行

fMRIと同時に計測された脳電位信号からの独立成分解析を用いたアーティファクト除去

Removing ballistocardiogram artifact from EEG data recorded simultaneously with fMRI data by independent component anaiysis
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内容記述(抄録等)
EEG data recorded simultaneously with fMRI data suffer from two specific artifacts and one of them is called Ballistocardiogram(BCG).Average subtraction has been used for removing it. However, average subtraction has been used for removing it. However, average subtraction requires an assumption that BCG waveforms are precisely periodiodic, which seems unrealistic decause BCG is a biomedical artifact. In this study, we apply independent component analysis(ICA) for removing BDG. ICA is a statistioal artifact. In this study, we data into statistically independent components. With the post-processing always improved the results of removal. With the proposed method, it is not necessary to assume that the BCG waveforms are periodic.