Accuracy of intracoronary Doppler ultrasound flow measurements in patients

Author

Dorsaz, P.-A. ; Dorsaz, L. ; Chatelain, P. ; Doriot, P.-A.

Author_Institution

Cardiology Center, Geneva Univ. Hospital, Switzerland

fYear

1997

fDate

7-10 Sep 1997

Firstpage

65

Lastpage

68

Abstract

The accuracy of coronary flow measurements performed in the cardiac catheterization laboratory by means of a Doppler guide wire has been estimated using an indirect method. The average peak velocity (APV) was recorded successively in the 3 branches of 30 arterial bifurcations. Biplane angiograms of these bifurcations were acquired to allow for accurate determination of the relevant cross sectional areas (CSA). The flows were calculated as product “0.5×CSA×APV”. To estimate the flow errors two (mutually exclusive) hypotheses were considered: (A) The mean (unsigned) absolute flow error is the same in the 90 branches. (B) The mean (unsigned) relative flow error is the same in the 90 branches. The second hypothesis proved to better represent the data; the mean relative error varies from 26% for low flow values to 16% for the high flow values

Keywords

Doppler measurement; angiocardiography; biomedical ultrasonics; blood flow measurement; measurement errors; Doppler guide wire; arterial bifurcations; average peak velocity; biplane angiograms; cardiac catheterization laboratory; high flow values; intracoronary Doppler ultrasound flow measurements accuracy; low flow values; mean absolute flow error; mean relative flow error; medical diagnostic imaging; relevant cross sectional areas; Bifurcation; Cardiology; Catheterization; Fluid flow measurement; Image segmentation; Performance evaluation; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1997

Conference_Location

Lund

ISSN

0276-6547

Print_ISBN

0-7803-4445-6

Type

conf

DOI

10.1109/CIC.1997.647831

Filename

647831