Document Detail

A biomedical system based on artificial neural network and principal component analysis for diagnosis of the heart valve diseases.
MedLine Citation:
PMID:  20703748     Owner:  NLM     Status:  In-Data-Review    
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.
Harun Uğuz
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Publication Detail:
Type:  Journal Article     Date:  2010-02-26
Journal Detail:
Title:  Journal of medical systems     Volume:  36     ISSN:  0148-5598     ISO Abbreviation:  J Med Syst     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-02-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7806056     Medline TA:  J Med Syst     Country:  United States    
Other Details:
Languages:  eng     Pagination:  61-72     Citation Subset:  IM    
Department of Computer Engineering, Selçuk University, Konya, Turkey,
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