J Med Syst - A biomedical system based on artificial neural network and principal component analysis for diagnosis of the heart valve diseases.

Tópicos

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Resumo

Listening via stethoscope is a primary method, being used by physicians for distinguishing normally and abnormal cardiac systems. Listening to the voices, coming from the cardiac valves via stethoscope, upon the flow of the blood running in the heart, physicians examine whether there is any abnormality with regard to the heart. However, listening via stethoscope has got a number of limitations, for interpreting different heart sounds depends on hearing ability, experience, and respective skill of the physician. Such limitations may be reduced by developing biomedical based decision support systems. In this study, a biomedical-based decision support system was developed for the classification of heart sound signals, obtained from 120 subjects with normal, pulmonary and mitral stenosis heart valve diseases via stethoscope. Developed system was mainly comprised of three stages, namely as being feature extraction, dimension reduction, and classification. At feature extraction stage, applying Discrete Fourier Transform (DFT) and Burg autoregressive (AR) spectrum analysis method, features, representing heart sounds in frequency domain, were obtained. Obtained features were reduced in lower dimensions via Principal Component Analysis (PCA), being used as a dimension reduction technique. Heart sounds were classified by having the features applied as input to Artificial Neural Network (ANN). Classification results have shown that, dimension reduction, being conducted via PCA, has got positive effects on the classification of the heart sounds.

Resumo Limpo

listen via stethoscop primari method use physician distinguish normal abnorm cardiac system listen voic come cardiac valv via stethoscop upon flow blood run heart physician examin whether abnorm regard heart howev listen via stethoscop got number limit interpret differ heart sound depend hear abil experi respect skill physician limit may reduc develop biomed base decis support system studi biomedicalbas decis support system develop classif heart sound signal obtain subject normal pulmonari mitral stenosi heart valv diseas via stethoscop develop system main compris three stage name featur extract dimens reduct classif featur extract stage appli discret fourier transform dft burg autoregress ar spectrum analysi method featur repres heart sound frequenc domain obtain obtain featur reduc lower dimens via princip compon analysi pca use dimens reduct techniqu heart sound classifi featur appli input artifici neural network ann classif result shown dimens reduct conduct via pca got posit effect classif heart sound

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