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arXiv 2204.04533cs.LG
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基于小波包分解和典型相关分析的单通道EEG和fNIRS信号运动伪影校正

Motion Artifacts Correction from Single-Channel EEG and fNIRS Signals using Novel Wavelet Packet Decomposition in Combination with Canonical Correlation Analysis

Universiti Kebangsaan Malaysia(马来西亚国民大学);Qatar University(卡塔尔大学);Hamad General Hospital(哈马德综合医院);Alkhor Hospital(阿尔霍尔医院);BIRDEM General Hospital(BIRDEM综合医院);North South University(南北大学)
Md Shafayet Hossain, Muhammad E. H. Chowdhury, Mamun Bin Ibne Reaz, Sawal H. M. Ali, Ahmad Ashrif A. Bakar, Serkan Kiranyaz, Amith Khandakar, Mohammed Alhatou, … 展开作者

Md Shafayet Hossain, Muhammad E. H. Chowdhury, Mamun Bin Ibne Reaz, Sawal H. M. Ali, Ahmad Ashrif A. Bakar, Serkan Kiranyaz, Amith Khandakar, Mohammed Alhatou, Rumana Habib, Muhammad Maqsud Hossain

摘要:

脑电图(EEG)和功能性近红外光谱(fNIRS)信号,高度非平稳的性质,极大地遭受运动伪影,而使用可穿戴传感器记录。本文提出了两种鲁棒的方法:i)小波包分解(WPD),和ii)WPD结合典型相关分析(WPD-CCA),从单通道EEG和fNIRS信号的运动伪影校正。使用基准数据集来测试这些所提出的技术的功效,并且使用两个公认的性能矩阵来测量所提出的方法的性能:i)信噪比的差异(ΔSNR)和ii)运动伪影的减少百分比(η)。对于所有可用的23个EEG记录,所提出的基于WPD的单阶段运动伪影校正技术在使用db2小波包时产生最高的平均ΔSNR(29.44 dB),而在使用db 1小波包时获得最大的平均η(53.48%)。我们提出的两阶段运动伪影校正技术,即利用db 1小波包的WPD-CCA方法,显示出最好的去噪性能,对所有EEG记录分别产生平均ΔSNR和η值为30.76 dB和59.51%。而两级运动伪影去除技术WPD-CCA的平均ΔSNR(16.55 dB,使用db 1小波包)和平均η(41.40%,使用fk 8小波包)最高。对于所有使用fk 4小波包的fNIRS信号,使用单级伪影去除技术(WPD)的最高平均ΔSNR和η分别为16.11 dB和26.40%。在EEG和fNIRS模式中,当采用两阶段WPD-CCA技术时,运动伪影的减少百分比分别增加了11.28%和56.82%。

英文摘要:

The electroencephalogram (EEG) and functional near-infrared spectroscopy (fNIRS) signals, highly non-stationary in nature, greatly suffers from motion artifacts while recorded using wearable sensors. This paper proposes two robust methods: i) Wavelet packet decomposition (WPD), and ii) WPD in combination with canonical correlation analysis (WPD-CCA), for motion artifact correction from single-channel EEG and fNIRS signals. The efficacy of these proposed techniques is tested using a benchmark dataset and the performance of the proposed methods is measured using two well-established performance matrices: i) Difference in the signal to noise ratio (ΔSNR) and ii) Percentage reduction in motion artifacts (η). The proposed WPD-based single-stage motion artifacts correction technique produces the highest average ΔSNR (29.44 dB) when db2 wavelet packet is incorporated whereas the greatest average η (53.48%) is obtained using db1 wavelet packet for all the available 23 EEG recordings. Our proposed two-stage motion artifacts correction technique i.e. the WPD-CCA method utilizing db1 wavelet packet has shown the best denoising performance producing an average ΔSNR and η values of 30.76 dB and 59.51%, respectively for all the EEG recordings. On the other hand, the two-stage motion artifacts removal technique i.e. WPD-CCA has produced the best average ΔSNR (16.55 dB, utilizing db1 wavelet packet) and largest average η (41.40%, using fk8 wavelet packet). The highest average ΔSNR and η using single-stage artifacts removal techniques (WPD) are found as 16.11 dB and 26.40%, respectively for all the fNIRS signals using fk4 wavelet packet. In both EEG and fNIRS modalities, the percentage reduction in motion artifacts increases by 11.28% and 56.82%, respectively when two-stage WPD-CCA techniques are employed.

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