Title :
Time-frequency and time-scale techniques for the classification of native and bioprosthetic heart valve sounds
Author :
Bentley, P.M. ; Grant, P.M. ; McDonnell, J.T.E.
Author_Institution :
Nokia R&D, Camberley, UK
Abstract :
The determination of diagnostic features in recorded heart sounds was investigated with Carpentier-Edwards (CE) bioprosthetic valves. Morphological features, extracted using the Choi-Williams distribution, achieved between 96 and 61% correct classification. The time-scale wavelet-transform feature set achieved 100% correct classification with native valve populations, and 87% with the CE replacements.
Keywords :
Fourier transforms; acoustic signal processing; bioacoustics; cardiology; feature extraction; mathematical morphology; medical signal processing; prosthetics; time-frequency analysis; wavelet transforms; Carpentier-Edwards bioprosthetic valves; Choi-Williams distribution; bioprosthetic heart valve sounds; cardiac sounds classification; diagnostic features determination; morphological features; native heart valve sounds; time-frequency techniques; time-scale techniques; time-scale wavelet-transform feature set; Continuous wavelet transforms; Feature extraction; Fourier transforms; Heart valves; Interference; Microphones; Signal analysis; Signal resolution; Time frequency analysis; Wavelet analysis; Aortic Valve; Bioprosthesis; Fourier Analysis; Heart Rate; Heart Sounds; Heart Valve Prosthesis; Heart Valves; Humans; Mitral Valve; Prosthesis Failure; Reference Values; Signal Processing, Computer-Assisted; Time Factors;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
