Document Detail

A virtual instrument for acquisition and analysis of the phonocardiogram and its internet-based application.
MedLine Citation:
PMID:  11886669     Owner:  NLM     Status:  MEDLINE    
The objective of this study is to develop a phonocardiogram (PCG) acquisition and analysis instrument using virtual instrumentation technology and investigate its Internet-based application. The PCG instrument was developed using a Pentium 200 computer, a data acquisition board, and a two-channel custom designed bio-signal preamplifier. LabVIEW was used to create the instrument's front panels. Spectral and joint time-frequency analyses were implemented into the instrument. This instrument can be used to display the PCG and to analyze the individual heart sound and murmur for the detection of heart valve diseases. Using a test-bed, the PCG data acquisition and analysis were performed remotely over the Internet. Through the main PCG panel, an operator can control the acquisition and analysis of PCG signals. In the remote test, real-time transmission of the PCG signal over the Internet was possible. Remote operators were able to view smoothly scrolling PCG waveforms and could control all the acquisition parameters and perform spectral and time-frequency analyses on the acquired heart sound. This study demonstrated that a LabVIEW-based medical virtual instrument provides a low-cost and flexible solution for data acquisition and analysis of PCG. It also showed that the current Internet supports the transmission of real-time PCG signals. Compared with other telemedicine systems, this application transfers not only the medical data, but also the virtual instrument and its signal processing capability through the Internet.
Z Guo; C Moulder; Y Zou; M Loew; L G Durand
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Telemedicine journal and e-health : the official journal of the American Telemedicine Association     Volume:  7     ISSN:  1530-5627     ISO Abbreviation:  Telemed J E Health     Publication Date:  2001  
Date Detail:
Created Date:  2002-03-11     Completed Date:  2002-04-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100959949     Medline TA:  Telemed J E Health     Country:  United States    
Other Details:
Languages:  eng     Pagination:  333-9     Citation Subset:  IM    
Department of Electrical and Computer Engineering, The George Washington University, Washington, DC 20052, USA.
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MeSH Terms
Heart Valve Diseases / diagnosis*
Internet / standards*
Phonocardiography / instrumentation,  methods*
Signal Processing, Computer-Assisted
Telemedicine / standards*,  trends
User-Computer Interface

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

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