Estimation of jet flow rate from Doppler proximal velocity acceleration: Theoretical predictions from conformal mapping of inviscid flow fields

James D. Thomas; Leonardo Rodriguez; Robert A. Levine; Arthur E. Weyman

Estimation of jet flow rate from Doppler proximal velocity acceleration: Theoretical predictions from conformal mapping of inviscid flow fields

James D. Thomas^*, Leonardo Rodriguez, Robert A. Levine, Arthur E. Weyman

^*Corresponding author for this work

Medicine, Cardiology Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The influence of finite orifice size and nonplanar global geometry on the calculation of flow rate from color Doppler echocardiography is examined. To investigate these two effects conformal mapping is used to simulate inviscid flow fields. It is found that 1) a finite orifice causes flow rate underestimation, but this error is negligible when the radius is beyond 3 orifice radii; and 2) a funnel-shaped inlet zone causes flow to be proportional to the amount of a hemisphere subtended by the funnel. These predictions are consistent with findings from previous in vitro and clinical studies.

Original language	English (US)
Title of host publication	Computers in Cardiology
Publisher	Publ by IEEE
Pages	617-620
Number of pages	4
ISBN (Print)	0818622253
State	Published - May 1 1991
Event	Computers in Cardiology - Proceedings - Chicago, IL, USA Duration: Sep 23 1990 → Sep 26 1990

Other

Other	Computers in Cardiology - Proceedings
City	Chicago, IL, USA
Period	9/23/90 → 9/26/90

ASJC Scopus subject areas

Software
Cardiology and Cardiovascular Medicine

Cite this

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title = "Estimation of jet flow rate from Doppler proximal velocity acceleration: Theoretical predictions from conformal mapping of inviscid flow fields",

abstract = "The influence of finite orifice size and nonplanar global geometry on the calculation of flow rate from color Doppler echocardiography is examined. To investigate these two effects conformal mapping is used to simulate inviscid flow fields. It is found that 1) a finite orifice causes flow rate underestimation, but this error is negligible when the radius is beyond 3 orifice radii; and 2) a funnel-shaped inlet zone causes flow to be proportional to the amount of a hemisphere subtended by the funnel. These predictions are consistent with findings from previous in vitro and clinical studies.",

author = "Thomas, {James D.} and Leonardo Rodriguez and Levine, {Robert A.} and Weyman, {Arthur E.}",

year = "1991",

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day = "1",

language = "English (US)",

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note = "Computers in Cardiology - Proceedings ; Conference date: 23-09-1990 Through 26-09-1990",

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T2 - Computers in Cardiology - Proceedings

AU - Thomas, James D.

AU - Rodriguez, Leonardo

AU - Levine, Robert A.

AU - Weyman, Arthur E.

PY - 1991/5/1

Y1 - 1991/5/1

N2 - The influence of finite orifice size and nonplanar global geometry on the calculation of flow rate from color Doppler echocardiography is examined. To investigate these two effects conformal mapping is used to simulate inviscid flow fields. It is found that 1) a finite orifice causes flow rate underestimation, but this error is negligible when the radius is beyond 3 orifice radii; and 2) a funnel-shaped inlet zone causes flow to be proportional to the amount of a hemisphere subtended by the funnel. These predictions are consistent with findings from previous in vitro and clinical studies.

AB - The influence of finite orifice size and nonplanar global geometry on the calculation of flow rate from color Doppler echocardiography is examined. To investigate these two effects conformal mapping is used to simulate inviscid flow fields. It is found that 1) a finite orifice causes flow rate underestimation, but this error is negligible when the radius is beyond 3 orifice radii; and 2) a funnel-shaped inlet zone causes flow to be proportional to the amount of a hemisphere subtended by the funnel. These predictions are consistent with findings from previous in vitro and clinical studies.

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M3 - Conference contribution

AN - SCOPUS:0026151309

SN - 0818622253

SP - 617

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BT - Computers in Cardiology

PB - Publ by IEEE

Y2 - 23 September 1990 through 26 September 1990

ER -

Estimation of jet flow rate from Doppler proximal velocity acceleration: Theoretical predictions from conformal mapping of inviscid flow fields

Abstract

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ASJC Scopus subject areas

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