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Mixture of Symmetric Stable Distributions for Macular Pathology Detection in Optical Coherence Tomography Scans Publisher Pubmed



Tajmirriahi M1 ; Rostamian R1 ; Amini Z1 ; Hamidi A2 ; Zam A3 ; Rabbani H1
Authors
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Authors Affiliations
  1. 1. School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Medical Image & Signal Processing Research Center, Isfahan, Iran
  2. 2. University of Basel, Biomedical Laser and Optics Group (BLOG), Department of Biomedical Engineering, Switzerland
  3. 3. New York University, United States

Source: Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS Published:2022


Abstract

Optical coherence tomography (OCT) is widely used to detect retinal disorders. In this study a new methodology is proposed for automatic detection of macular pathologies in the OCT images. Our approach is based on modeling the normal and abnormal OCT images with α-stable mixture model represented by stochastic differential equations (SDE). Parameters of the model are used to detect abnormal OCT images. The α-stable mixture model is created after applying a fractional Laplacian operator to the image and Expectation-Maximization (EM) algorithm is applied to estimate its parameters. The classification of an OCT image as normal or abnormal would be done by training SVM classifier based on estimated parameters of the mixture model. This method is examined for macular abnormality detection such as AMD, DME, and MH and achieve maximum accuracy of 97.8%. Clinical Relevance - This study establishes automatic method for anomaly detection on OCT images and provides fast and accurate OCT interpretation in clinical application. © 2022 IEEE.
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