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Automatic identification and characterization of the epiretinal membrane in OCT images

机译:OCT图像中视网膜前膜的自动识别和表征

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摘要

Optical coherence tomography (OCT) is a medical image modality that is used to capture, non-invasively, high-resolution cross-sectional images of the retinal tissue. These images constitute a suitable scenario for the diagnosis of relevant eye diseases like the vitreomacular traction or the diabetic retinopathy. The identification of the epiretinal membrane (ERM) is a relevant issue as its presence constitutes a symptom of diseases like the macular edema, deteriorating the vision quality of the patients. This work presents an automatic methodology for the identification of the ERM presence in OCT scans. Initially, a complete and heterogeneous set of features was defined to capture the properties of the ERM in the OCT scans. Selected features went through a feature selection process to further improve the method efficiency. Additionally, representative classifiers were trained and tested to measure the suitability of the proposed approach. The method was tested with a dataset of 285 OCT scans labeled by a specialist. In particular, 3,600 samples were equally extracted from the dataset, representing zones with and without ERM presence. Different experiments were conducted to reach the most suitable approach. Finally, selected classifiers were trained and compared using different metrics, providing in the best configuration an accuracy of 89.35%.
机译:光学相干断层扫描(OCT)是一种医学图像模式,可用于以非侵入方式捕获视网膜组织的高分辨率横截面图像。这些图像构成了用于诊断相关眼部疾病(如玻璃体牵引或糖尿病性视网膜病变)的合适方案。视网膜上膜(ERM)的鉴定是一个相关问题,因为其存在会构成黄斑水肿等疾病的症状,从而使患者的视力下降。这项工作提出了一种自动方法,可用于识别OCT扫描中的ERM。最初,定义了一组完整的异构特征以捕获OCT扫描中ERM的属性。选定的特征经过特征选择过程以进一步提高方法效率。此外,对代表性分类器进行了培训和测试,以衡量所提出方法的适用性。使用专家标记的285次OCT扫描的数据集对该方法进行了测试。特别是,从数据集中平均提取了3600个样本,分别代表存在和不存在ERM的区域。进行了不同的实验以达到最合适的方法。最后,使用不同的指标对选定的分类器进行训练和比较,以最佳配置提供89.35%的准确性。

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