Automated Macular Disease Classification from OCT Images using Feature Attention Fusion Network

Automated Macular Disease Classification from OCT Images using Feature Attention Fusion Network

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© 2024 by IJETT Journal
Volume-72 Issue-3
Year of Publication : 2024
Author : V. Latha, Sreeni K G
DOI : 10.14445/22315381/IJETT-V72I3P134

How to Cite?

V. Latha, Sreeni K G, "Automated Macular Disease Classification from OCT Images using Feature Attention Fusion Network," International Journal of Engineering Trends and Technology, vol. 72, no. 3, pp. 391-401, 2024. Crossref, https://doi.org/10.14445/22315381/IJETT-V72I3P134

Abstract
Optical Coherence Tomography (OCT) is a promising and essential tool for retinopathy diagnosis. Ophthalmologists use OCT images to identify, treat, and track macular diseases. Manually analysing and interpreting these illnesses from the enormous volume of OCT images takes time and effort. The Convolutional Neural Network (CNN), a potential deep learning method, has proven exceptionally accurate in classifying images, making them suitable for computerassisted diagnosis. This paper introduces a CNN-based feature extraction and attention fusion network, the FAF-Net, to classify common macular diseases. This network enhances the flexibility and accuracy of conventional CNN classification systems. The attention module strengthens pre-trained CNN models by emphasising significant features related to anatomical defects in the retina while reducing the importance of irrelevant regions. Combining deep pre-trained models with attention processes further improves classification accuracy. This study used OCT data to diagnose macular disorders using pre-trained models VGG16 and ResNet50. The proposed approach was assessed on the UCSD dataset, a publicly available OCT imaging dataset, achieving a classification accuracy of 98.40%. Additionally, Gradient-weighted Class Activation Mapping (GradCAM) was employed as a visualisation technique to assess the efficacy of the FAF-Net. These results demonstrate that the proposed FAF-Net approach substantially increases classifier performance. This method has a promising future in the medical field and provides a robust conceptual framework for diagnosing macular diseases.

Keywords
CNN, Deep learning, Feature extraction, Image classification.

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