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Noise suppression is a key technique in retrieving weak magnetic signal from human heart. In order to improve the signal-to-noise ratio (SNR) of magnetocardiography (MCG) signals, signal average method is widely used. However, due to the existence of local environmental interference, averaging the whole section data would unavoidable bring distortion to the average signal. In this paper, the authors proposed a kind of selective average method by using the template matching. The results showed that this method can effectively eliminate the data section with interference such as low frequency fluctuation, pulse burr etc. Thus averaging MCG signal with high SNR and fidelity will be obtained.
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Keywords:
- magnetocardiograph /
- signal average /
- noise suppression /
- signal-to-noise ratio
[1] Pizzella V, Penna S D, Gratta C D, Romani G L 2011 Supercond. Sci. Technol. 14 R79-R114
[2] Sternickel K, Braginski A I 2006 Supercond. Sci. Technol. 19 S160
[3] Yang F S, Gao S K 1988 Biomedical Signal Processing (Beijing: Higher Education Press) p276 (in Chinese) [杨福生, 高上凯 1988 生物医学信号处理 (北京: 高等教育出版社) 第276页]
[4] Kim K, Lee Y H, Kwon H, Kim J M, Kim I S, Park Y K 2004 Neurology and clinical Neurophysiology 42 1
[5] DiPietroPaolo D, Muller H P, Erne S N 2005 Phys. Med. Biol. 50 2415
[6] Cheng X M, Lin J S, Zhang Z G 1999 Chinese J. Biomed. Eng. 18 89 (in Chinese) [程小明, 林金森, 张正国 1999 中国生物医学工程学报 18 89]
[7] Zhang S L, Wang Y L, Wang H W, Jiang S Q, Xie X M 2009 Phys. Med. Biol. 54 4793
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[1] Pizzella V, Penna S D, Gratta C D, Romani G L 2011 Supercond. Sci. Technol. 14 R79-R114
[2] Sternickel K, Braginski A I 2006 Supercond. Sci. Technol. 19 S160
[3] Yang F S, Gao S K 1988 Biomedical Signal Processing (Beijing: Higher Education Press) p276 (in Chinese) [杨福生, 高上凯 1988 生物医学信号处理 (北京: 高等教育出版社) 第276页]
[4] Kim K, Lee Y H, Kwon H, Kim J M, Kim I S, Park Y K 2004 Neurology and clinical Neurophysiology 42 1
[5] DiPietroPaolo D, Muller H P, Erne S N 2005 Phys. Med. Biol. 50 2415
[6] Cheng X M, Lin J S, Zhang Z G 1999 Chinese J. Biomed. Eng. 18 89 (in Chinese) [程小明, 林金森, 张正国 1999 中国生物医学工程学报 18 89]
[7] Zhang S L, Wang Y L, Wang H W, Jiang S Q, Xie X M 2009 Phys. Med. Biol. 54 4793
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