期刊
COMPUTERS IN BIOLOGY AND MEDICINE
卷 65, 期 -, 页码 124-136出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compbiomed.2015.06.018
关键词
Automated delineation; Segmentation; Geographic atrophy of the retinal pigment epithelium; Age-related macular degeneration; AREDS color fundus imagery; Machine learning
类别
资金
- National Eye Institute of the National Institutes of Health [R21EY024310]
- James P. Gills Professorship
- JHU Whiting School of Engineering SPUR program
Background: Age-related macular degeneration (AMD), left untreated, is the leading cause of vision loss in people older than 55. Severe central vision loss occurs in the advanced stage of the disease, characterized by either the in growth of choroidal neovascularization (CNV), termed the wet form, or by geographic atrophy (GA) of the retinal pigment epithelium (RPE) involving the center of the macula, termed the dry form. Tracking the change in GA area over time is important since it allows for the characterization of the effectiveness of GA treatments. Tracking GA evolution can be achieved by physicians performing manual delineation of GA area on retinal fiindus images. However, manual GA delineation is time-consuming and subject to inter-and intra-observer variability. Methods: We have developed a fully automated GA segmentation algorithm in color fundus images that uses a supervised machine learning approach employing a random forest classifier. This algorithm is developed and tested using a dataset of images from the NIH-sponsored Age Related Eye Disease Study (AREDS). GA segmentation output was compared against a manual delineation by a retina specialist. Results: Using 143 color fundus images from 55 different patient eyes, our algorithm achieved PPV of 0.82 +/- 0.19, and NPV of 0:95 +/- 0.07. Discussion: This is the first study, to our knowledge, applying machine learning methods to GA segmentation on color fundus images and using AREDS imagery for testing. These preliminary results show promising evidence that machine learning methods may have utility in automated characterization of GA from color fundus images. (C) 2015 Elsevier Ltd. All rights reserved.
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