Document Detail

Measurement accuracy of the flow velocity in pulsed ultrasound Doppler velocimeter.
MedLine Citation:
PMID:  10576269     Owner:  NLM     Status:  MEDLINE    
This paper presents a numerical simulation method for evaluating the measurement accuracy of the high-frequency pulsed ultrasound Doppler velocimeter (PUDV). The frequency distribution of the Doppler signal from a sample volume is calculated by dividing the sample volume into small cells and using the statistics of the velocities of the cells. The distribution is used to analyze the accuracy of the poststenotic velocity measurements of a 20-MHz 80-channel PUDV. The target flow field is obtained by solving Navier-Stokes equations numerically. It was shown that the velocities evaluated by the zero-cross and Fourier transform methods agreed well with the given velocities, and that flow separation was successfully detected. It was also shown that the tube diameter should be at least twice as large as the diameter of the sample volume to obtain accurate measurements.
M Kagiyama; Y Ogasawara; S Tadaoka; F Kajiya
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasound in medicine & biology     Volume:  25     ISSN:  0301-5629     ISO Abbreviation:  Ultrasound Med Biol     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-12-07     Completed Date:  1999-12-07     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  0410553     Medline TA:  Ultrasound Med Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1265-74     Citation Subset:  IM    
Department of Medical Engineering, Kawasaki College of Allied Medical Professions, Kurashiki City, Japan.
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MeSH Terms
Blood Flow Velocity*
Blood Vessels / ultrasonography
Constriction, Pathologic
Fourier Analysis
Numerical Analysis, Computer-Assisted
Phantoms, Imaging*
Ultrasonography, Doppler, Pulsed*

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