三次元補償コイルと適応フィルタによる生体磁気の雑音処理法の検討

概要

論文の詳細を見る
Somatosensory evoked field (SEF) using a 39-channel SQUID system was carried out. We proposed a new method for improving the signal-to-noise (SN) ratio. The proposed method, combining a reference coil (hardware) with adaptive filter (ADF) processing (software), was applied to the SEF data. First, independent component analysis (ICA) was applied to the SEF data, and correlation coefficient between each independent component and measured data with the reference coil was calculated. Second, the adaptive noise processing was applied to frequency components obtain by the discrete wavelet transform (DWT). The SN ratio of averaged SEF data obtained by proposed method was improved than ordinary averaging method. We confirmed that the proposed method, combining information of the hardware (reference coil) and the software technique (the ICA and the ADF) is useful to improve the SN ratio of the SEF data.
社団法人日本磁気学会の論文
2007-07-01