Cortical Dipole Imaging for Multiple Signal Sources Considering Time-Varying Non-Uniform Noise

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2011/11/01

タイトル(英語): Cortical Dipole Imaging for Multiple Signal Sources Considering Time-Varying Non-Uniform Noise

著者名: Junichi Hori (Graduate School of Science and Technology, Niigata University), Yoshiki Watanabe (Graduate School of Science and Technology, Niigata University)

著者名(英語): Junichi Hori (Graduate School of Science and Technology, Niigata University), Yoshiki Watanabe (Graduate School of Science and Technology, Niigata University)

キーワード: EEG，cortical dipole imaging，spatial inverse filter，noise covariance，independent component analysis，multiple sources

要約(英語): Cortical dipole imaging is one of the spatial enhancement techniques from the scalp electroencephalogram. We investigated the dipole imaging for multiple signal sources under time-varying non-uniform noise conditions. The effects of incorporating statistical information of noise into the spatiotemporal inverse filter were examined by computer simulations and experimental studies in three sphere volume conductor model. The parametric projection filter that incorporated with noise covariance was applied to the inverse problem of EEG measurements. The noise covariance matrix was estimated by applying independent component analysis to the scalp potentials. The spatial filter was expanded to apply to the time-varying non-uniform noise conditions such as eye blink artifact. Moreover, multiple dipole distributions were introduced to extract and to visualize individual signal sources. The proposed imaging technique was applied to human experimental data of visual evoked potentials. We obtained reasonable results that coincide to physiological knowledge.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.131 No.11 （2011） 特集：電気関係学会関西連合大会

本誌掲載ページ: 1958-1965 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/131/11/131_11_1958/_article/-char/ja/