| Autor: |
Robert H. Eikelboom, William H. Morgan, Ludmila Jitskaia, Kanagasingam Yogesan, Phillip H. House, Chris J Barry |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
Medical Imaging: Image Processing |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.348531 |
| Popis: |
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%.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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