Share Email Print
cover

Proceedings Paper

Color adjustment techniques to improve utility of stereo flicker chronoscopy and chronometry assessment of serial optic disk photographs in glaucoma patients
Author(s): Robert H. Eikelboom; Kanagasingam Yogesan; Christopher J. Barry; Ludmila Jitskaia; Phillip H. House; William H. Morgan
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The aim of this study was to develop a computerized stereo- flicker chronoscopy and chronometry system to improve the technique of neuroretinal optic disc rim assessment. Digitized stereo photographs of 22 eyes of glaucoma patients were analyzed subjectively by computerized flickering of serial images, and objectively by measuring the width of the neuroretinal rim at 18 positions around the optic disc. A major source of error was identified as color changes in the images over time. Color adjustment algorithms were developed and the assessments and measurements were repeated. For chronometry after color adjustment there was improvement to most of the tests on the data: agreement (50% to 73%), specificity (45% to 84%), positive agreement (50% to 71%) and negative agreement (50% to 73%). Sensitivity remained constant at about 55%.

Paper Details

Date Published: 21 May 1999
PDF: 7 pages
Proc. SPIE 3661, Medical Imaging 1999: Image Processing, (21 May 1999); doi: 10.1117/12.348531
Show Author Affiliations
Robert H. Eikelboom, Lions Eye Institute and Univ. of Western Australia (Australia)
Kanagasingam Yogesan, Lions Eye Institute and Univ. of Western Australia (Australia)
Christopher J. Barry, Lions Eye Institute and Univ. of Western Australia (Australia)
Ludmila Jitskaia, Lions Eye Institute and Univ. of Western Australia (Australia)
Phillip H. House, Lions Eye Institute and Univ. of Western Australia (Australia)
William H. Morgan, Lions Eye Institute and Univ. of Western Australia (Australia)


Published in SPIE Proceedings Vol. 3661:
Medical Imaging 1999: Image Processing
Kenneth M. Hanson, Editor(s)

© SPIE. Terms of Use
Back to Top