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Updated: Aug 17, 2026
Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
Color Doppler imaging of ophthalmic artery blood flow velocity: a study of repeatability and agreement
L Quaranta1, A Harris, F Donato
1Centro Glaucoma-Clinica Oculistica, Università degli Studi di Brescia,Italy.
Purpose:
Color Doppler imaging (CDI) is a relatively new technique that allows quantification of blood flow velocity in orbital and ocular vasculature. Despite the numerous clinical studies that have used CDI, repeatability of this technique and agreement between observers have not been documented.
Methods:
The authors performed a prospective investigation of the repeatability and agreement between observers on ophthalmic artery blood flow velocity measurements in 35 patients (35 eyes).
Results:
Results on the estimated error of measurement (variability between repeated readings on the same subject) indicate good repeatability of the measurements; in fact, the measurement variances were only 5.6% for the peak systolic velocity, 11.4% for the end diastolic velocity, and 6.2% for the mean envelope velocity. The statistical analysis of repeatability showed a very narrow 95% confidence interval for both observers. The measurement of agreement between the two observers demonstrated the existence of a good concordance of the measurements taken by each observer on each subject.
Conclusions:
Results suggest that CDI is a reliable tool for quantitative assessment of ophthalmic artery blood flow velocity.
