4.7 Article

Deep Learning with a Dataset Created Using Kanno Saitama Macro, a Self-Made Automatic Foveal Avascular Zone Extraction Program

Journal

JOURNAL OF CLINICAL MEDICINE
Volume 12, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/jcm12010183

Keywords

foveal avascular zone; automatic extraction; manually extract; U-Net; annotation

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In this study, a dataset created by Kanno Saitama Macro (KSM) for deep learning was used to extract the foveal avascular zone (FAZ) from optical coherence tomography angiography (OCTA) images. The results showed that the dataset generated by KSM had good agreement with the manual method, indicating its potential in reducing the burden of annotation in deep learning.
The extraction of the foveal avascular zone (FAZ) from optical coherence tomography angiography (OCTA) images has been used in many studies in recent years due to its association with various ophthalmic diseases. In this study, we investigated the utility of a dataset for deep learning created using Kanno Saitama Macro (KSM), a program that automatically extracts the FAZ using swept-source OCTA. The test data included 40 eyes of 20 healthy volunteers. For training and validation, we used 257 eyes from 257 patients. The FAZ of the retinal surface image was extracted using KSM, and a dataset for FAZ extraction was created. Based on that dataset, we conducted a training test using a typical U-Net. Two examiners manually extracted the FAZ of the test data, and the results were used as gold standards to compare the Jaccard coefficients between examiners, and between each examiner and the U-Net. The Jaccard coefficient was 0.931 between examiner 1 and examiner 2, 0.951 between examiner 1 and the U-Net, and 0.933 between examiner 2 and the U-Net. The Jaccard coefficients were significantly better between examiner 1 and the U-Net than between examiner 1 and examiner 2 (p < 0.001). These data indicated that the dataset generated by KSM was as good as, if not better than, the agreement between examiners using the manual method. KSM may contribute to reducing the burden of annotation in deep learning.

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