Retinal vessel measurement: comparison between observer and computer driven methods

Richard S. B. Newsom; Paul M. Sullivan; Sal M. B. Rassam; Roger Jagoe; Eva M. Kohner

doi:10.1007/BF00176292

Retinal vessel measurement: comparison between observer and computer driven methods

Richard S. B. Newsom^*, Paul M. Sullivan, Sal M. B. Rassam, Roger Jagoe, Eva M. Kohner

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A method of semi-automated image analysis for the measurement of retinal vessel diameters is described. This was compared with an observer-driven method for reproducibility and accuracy. The coefficient of variation for the data from the semi-automated method was 1.5-7.5% (depending on the vessel diameter) compared to 6-34% with the observer-driven method. The mean vessel diameters using the observer-driven method tended to be higher; however, this did not reach significance. The speed and low inter- and intra-observer variability for the semi-automated method make it a useful technique for measuring retinal blood vessel diameters. A larger variability was found between photographs taken at different times. This may be due to changes in retinal vessel diameter with changes in retinal perfusion pressure during the cardiac cycle.

Original language	English
Pages (from-to)	221-225
Number of pages	5
Journal	Graefe's Archive for Clinical and Experimental Ophthalmology
Volume	230
Issue number	3
DOIs	https://doi.org/10.1007/BF00176292
Publication status	Published - 1 May 1992

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title = "Retinal vessel measurement: comparison between observer and computer driven methods",

abstract = "A method of semi-automated image analysis for the measurement of retinal vessel diameters is described. This was compared with an observer-driven method for reproducibility and accuracy. The coefficient of variation for the data from the semi-automated method was 1.5-7.5\% (depending on the vessel diameter) compared to 6-34\% with the observer-driven method. The mean vessel diameters using the observer-driven method tended to be higher; however, this did not reach significance. The speed and low inter- and intra-observer variability for the semi-automated method make it a useful technique for measuring retinal blood vessel diameters. A larger variability was found between photographs taken at different times. This may be due to changes in retinal vessel diameter with changes in retinal perfusion pressure during the cardiac cycle.",

author = "Newsom, \{Richard S. B.\} and Sullivan, \{Paul M.\} and Rassam, \{Sal M. B.\} and Roger Jagoe and Kohner, \{Eva M.\}",

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T2 - comparison between observer and computer driven methods

AU - Newsom, Richard S. B.

AU - Sullivan, Paul M.

AU - Rassam, Sal M. B.

AU - Jagoe, Roger

AU - Kohner, Eva M.

PY - 1992/5/1

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N2 - A method of semi-automated image analysis for the measurement of retinal vessel diameters is described. This was compared with an observer-driven method for reproducibility and accuracy. The coefficient of variation for the data from the semi-automated method was 1.5-7.5% (depending on the vessel diameter) compared to 6-34% with the observer-driven method. The mean vessel diameters using the observer-driven method tended to be higher; however, this did not reach significance. The speed and low inter- and intra-observer variability for the semi-automated method make it a useful technique for measuring retinal blood vessel diameters. A larger variability was found between photographs taken at different times. This may be due to changes in retinal vessel diameter with changes in retinal perfusion pressure during the cardiac cycle.

AB - A method of semi-automated image analysis for the measurement of retinal vessel diameters is described. This was compared with an observer-driven method for reproducibility and accuracy. The coefficient of variation for the data from the semi-automated method was 1.5-7.5% (depending on the vessel diameter) compared to 6-34% with the observer-driven method. The mean vessel diameters using the observer-driven method tended to be higher; however, this did not reach significance. The speed and low inter- and intra-observer variability for the semi-automated method make it a useful technique for measuring retinal blood vessel diameters. A larger variability was found between photographs taken at different times. This may be due to changes in retinal vessel diameter with changes in retinal perfusion pressure during the cardiac cycle.

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JO - Graefe's Archive for Clinical and Experimental Ophthalmology

JF - Graefe's Archive for Clinical and Experimental Ophthalmology

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Retinal vessel measurement: comparison between observer and computer driven methods

Abstract

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