Journal: Advances in Medicine and Engineering Interdisciplinary Research DOI: 10.32629/ameir.v4i3.5470
Abstract
Magnetocardiography (MCG) is a non-invasive cardiac detection technology that is radiation-free and is suitable for all populations. But the raw magnetocardiography signal is polluted by power noise, baseline drift, and pulse artifacts, thereby reducing the quality of cardiac magnetic imaging and electrophysiological analysis. This paper utilizes an integrated denoising method and gives two-dimensional magnetic field mapping calculation process. Serial multi-stage denoising chain, including bandpass filtering, notch filtering, median filtering, and wavelet filtering is applied to suppress various noises, while retaining the magnetocardiography waveform characteristic. And gives the calculation of isomagnetic map, pseudo current density map, and curl map.
Keywords
magnetocardiography; denoising; isomagnetic map; pseudo current density map; curl map
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[3] Mace S E, Peacock W F, Stopyra J, et al. Accelerated magnetocardiography in the evaluation of patients with suspected cardiac ischemia: The MAGNETO trial. American Heart Journal Plus: Cardiology Research and Practice, 2024, 40(c): 100372. https://doi.org/10.1016/j.ahjo.2024.100372.
[4] G. Szentirmai. Two-port equivalences for bandpass filters. IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications. 2000, 47(9): 1431-1437. https://doi.org/10.1109/81.883342.
[5] Hiroyuki Munakata, Shunsuke Koshita, Masahide Abe, Masayuki Kawamata. Improvement of convergence speed for an adaptive notch filter based on simplified lattice algorithm using pilot notch filters. 2016 IEEE International Conference on Network Infrastructure and Digital Content (IC-NIDC). https://doi.org/10.1109/ICNIDC.2016.7974587.
[6] J. Astola, P. Heinonen, Y. Neuvo. On root structures of median and median-type filters. IEEE Transactions on Acoustics, Speech, and Signal Processing. 1987, 35(8): 1199-1201. https://doi.org/10.1109/TASSP.1987.1165269.
[7] L. G. Akulov. Wavelet filtering in digital signal processing systems. 2014 International Conference on Actual Problems of Electron Devices Engineering (APEDE). https://doi.org/10.1109/APEDE.2014.6958205.
[8] Kazuhide Shigemi, Shoichi Koyama, Tomohiko Nakamura, Hiroshi Saruwatari. Physics-Informed Convolutional Neural Network with Bicubic Spline Interpolation for Sound Field Estimation. 2022 International Workshop on Acoustic Signal Enhancement (IWAENC). https://doi.org/10.1109/IWAENC53105.2022.9914792.
[9] Udovychenko Y, Popov A, Chaikovsky I. Multistage classification of current density distribution maps of various heart states based on correlation analysis and k-NN algorithm. Frontiers in Medical Technology, 2021, 3:779800. https://doi.org/10.3389/fmedt.2021.779800.
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