Document Detail

Generalized blind delayed source separation model for online non-invasive twin-fetal sound separation: a phantom study.
MedLine Citation:
PMID:  18461816     Owner:  NLM     Status:  MEDLINE    
The fetal phonocardiogram, which is the acoustic recording of mechanical activity of the fetal heart, facilitates the measurement of the instantaneous fetal heart rate, beat-to-beat differences and duration of systolic and diastolic phases. These measures are sensitive indicators of cardiac function, reflecting fetal well-being. This paper provides an algorithm to non-invasively estimate the phonocardiogram of an individual fetus in a multiple fetus pregnancy. A mixture of fetal phonocardiograms is modeled by a generalized pure delayed mixing model. Mutual independence of fetal phonocardiograms is assumed to apply blind source separation based techniques to extract the fetal phonocardiograms from their mixtures. The performance of the algorithm is verified through simulation results and on experimental data obtained from a phantom that is used to simulate a twin pregnancy.
Vivek Nigam; Roland Priemer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of medical systems     Volume:  32     ISSN:  0148-5598     ISO Abbreviation:  J Med Syst     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-05-08     Completed Date:  2008-07-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7806056     Medline TA:  J Med Syst     Country:  United States    
Other Details:
Languages:  eng     Pagination:  123-35     Citation Subset:  IM    
Ikoa, Inc, Menlo Park, CA, 94025, USA.
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MeSH Terms
Diagnosis, Computer-Assisted*
Fetal Heart / ultrasonography*
Heart Auscultation
Heart Sounds*
Signal Processing, Computer-Assisted*

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