Title: Analysis of Foveal Avascular Zone for grading of Diabetic Retinopathy

Authors: M.H. Ahmad Fadzil, Lila Iznita Izhar, Hanung Adi Nugroho

Addresses: Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh 31750, Perak, Malaysia. ' Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh 31750, Perak, Malaysia. ' Department of Electrical Engineering, Universitas Gadjah Mada, Jl. Grafika 2, Kampus UGM, Jogjakarta 55281, Indonesia

Abstract: At present, it is difficult to determine Foveal Avascular Zone (FAZ) enlargement based on colour fundus images. Fundus image analysis presents several challenges such as high image variability, improper illumination and artifacts. A new approach for grading Diabetic Retinopathy (DR) by analysing FAZ enlargement in colour fundus image has been developed. Investigations show that FAZ area ranges can be used to indicate progression of the disease. The mean accuracy and standard deviation of ranges obtained are 92.2% and 3.22, respectively. This new approach is reliable, accurate and fast compared to the current method based on DR pathologies.

Keywords: biomedical image processing; colour fundus images; diabetic retinopathy grading; FAZ enlargement; foveal avascular zone; colour images.

DOI: 10.1504/IJBET.2011.041463

International Journal of Biomedical Engineering and Technology, 2011 Vol.6 No.3, pp.232 - 250

Published online: 21 Jan 2015 *

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