Assessment of multichannel lung sounds parameterization for two-class classification in interstitial lung disease patients

Authors:
S. Charleston-Villalobos;G. Martinez-Hernandez;R. Gonzalez-Camarena;G. Chi-Lem;J. G. Carrillo;T. Aljama-Corrales
Affiliations:
Electrical Engineering Department, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico;Electrical Engineering Department, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico;Department of Health Science, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico;National Institute of Respiratory Diseases, Mexico City 14080, Mexico;National Institute of Respiratory Diseases, Mexico City 14080, Mexico;Electrical Engineering Department, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico
Venue:
Computers in Biology and Medicine
Year:
2011

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Abstract

This work deals with the assessment of different parameterization techniques for lung sounds (LS) acquired on the whole posterior thoracic surface for normal versus abnormal LS classification. Besides the conventional technique of power spectral density (PSD), the eigenvalues of the covariance matrix and both the univariate autoregressive (UAR) and the multivariate autoregressive models (MAR) were applied for constructing feature vectors as input to a supervised neural network (SNN). The results showed the effectiveness of the UAR modeling for multichannel LS parameterization, using new data, with classification accuracy of 75% and 93% for healthy subjects and patients, respectively.