Abstract
In this paper a novel method for acoustic imaging of heart is proposed. Heart is assumed to be a spread acoustic source which generates sound from its different locations. A simultaneous multisensor recording is used to record the heart sound from human chest wall. By using beamforming techniques the recorded data are combined to form a two or three dimensional representation of heart sound distribution. This map shows the acoustic energy of heart in different locations. Simulations with different array arrangements are done to verify the performance of this system. The heart sound is segmented without any need for other biosignals using an unsupervised method. This procedure is used to separate first and second heart sound. The segmented signal is used in beamforming algorithm. This results in a time-space map of heart sound for different intervals of heart activity. A setup is designed and implemented to record heart sound from human chest. Data are saved on a personal computer for signal processing in order to form a two or three dimensional image. This noninvasive and inexpensive imaging method offers new aspects, which with further studies, can help physicians in more precise diagnosing of heart diseases.
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© 2009 International Federation of Medical and Biological Engineering
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Kajbaf, H., Ghassemian, H. (2009). Acoustic Imaging of Heart Using Microphone Arrays. In: Lim, C.T., Goh, J.C.H. (eds) 13th International Conference on Biomedical Engineering. IFMBE Proceedings, vol 23. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-92841-6_181
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DOI: https://doi.org/10.1007/978-3-540-92841-6_181
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-92840-9
Online ISBN: 978-3-540-92841-6
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