Automated analysis of flow convergence proximal to regurgitant orifices: Flow rate calculation using digital Doppler velocity maps

J. D. Thomas*, D. H. Thoreau, P. M. Vandervoort, R. A. Levine, A. E. Weyman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

To automate quantification of valvular regurgitation, the authors developed an algorithm which uses the full proximal convergence zone (output as a digital map) to automatically define the orifice center and calculate the flow rate. For a user defined region of interest, the actual velocity field is compared with the expected velocity map generated by the function v = (Qcosψ/2πr2), where r is the distance from the test center, ψ the angle between the converging velocity and the ultrasound beam, and Q the flow rate which is being solved for. The optimal orifice center is that point which maximizes the correlation between observed and predicted velocity. In vitro testing revealed good agreement with flow rate: r = 0.98, ΔQ = -3.7 ± 15.8 cm3/sec.

Original languageEnglish (US)
Title of host publicationComputers in Cardiology
PublisherPubl by IEEE
Pages13-16
Number of pages4
ISBN (Print)081862485X
StatePublished - Jan 1 1992
EventProceedings of the 18th Annual Conference on Computers in Cardiology - Venice, Italy
Duration: Sep 23 1991Sep 26 1991

Publication series

NameComputers in Cardiology
ISSN (Print)0276-6574

Other

OtherProceedings of the 18th Annual Conference on Computers in Cardiology
CityVenice, Italy
Period9/23/919/26/91

ASJC Scopus subject areas

  • Computer Science Applications
  • Cardiology and Cardiovascular Medicine

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