Document Detail


A robust method for heart sounds localization using lung sounds entropy.
MedLine Citation:
PMID:  16532776     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Heart sounds are the main unavoidable interference in lung sound recording and analysis. Hence, several techniques have been developed to reduce or cancel heart sounds (HS) from lung sound records. The first step in most HS cancellation techniques is to detect the segments including HS. This paper proposes a novel method for HS localization using entropy of the lung sounds. We investigated both Shannon and Renyi entropies and the results of the method using Shannon entropy were superior. Another HS localization method based on multiresolution product of lung sounds wavelet coefficients adopted from was also implemented for comparison. The methods were tested on data from 6 healthy subjects recorded at low (7.5 ml/s/kg) and medium 115 ml/s/kg) flow rates. The error of entropy-based method using Shannon entropy was found to be 0.1 +/- 0.4% and 1.0 +/- 0.7% at low and medium flow rates, respectively, which is significantly lower than that of multiresolution product method and those of other methods reported in previous studies. The proposed method is fully automated and detects HS included segments in a completely unsupervised manner.
Authors:
Azadeh Yadollahi; Zahra M K Moussavi
Related Documents :
17412776 - Transpleural ventilation of explanted human lungs.
10932686 - The diaphragmatic compound muscle action potentials (dcmaps) at different lung volumes-...
6473946 - The effect of exercise on the deposition of an inhaled aerosol.
2284156 - Vasopressin in oligohydramnios-induced lung hypoplasia.
9261186 - Structural elucidation of oxygenated storage lipids in cucumber cotyledons. implication...
16047386 - Effects of exercise on gallbladder volume and motility in obese women.
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  53     ISSN:  0018-9294     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-14     Completed Date:  2006-04-13     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  497-502     Citation Subset:  IM    
Affiliation:
Department of Electrical Engineering, Sharif university of Technology, Tehran, Iran. azadeh@ee.umanitoba.ca
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Artifacts*
Diagnosis, Computer-Assisted / methods*
Female
Heart / physiology*
Heart Sounds / physiology*
Humans
Lung / physiology*
Male
Reproducibility of Results
Respiratory Sounds / physiology*
Sensitivity and Specificity
Sound Spectrography / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Cardiorespiratory-based sleep staging in subjects with obstructive sleep apnea.
Next Document:  Bayesian spatio-temporal approach for EEG source reconstruction: conciliating ECD and distributed mo...