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:: Volume 22, Issue 4 (Iranian Journal of Ophthalmology 2010) ::
2010, 22(4): 73-79 Back to browse issues page
A Modified Semiautomatic Method for Measurement of Hyperfluorescence Area in Fluorescein Angiography
Khalil Ghasemi Falavarjani Dr., Hanieh Mohammadreza , Sedigheh Marjaneh Hejazi Dr. * , Masood Naseripour Dr.
, mhejazi@sina.tums.ac.ir
Abstract:   (11287 Views)

Purpose : To offer a semi-automatic algorithm to determine the area of angiographic hyperfluorescence

Methods : The proposed algorithm included wavelet filter, histogram equalization and modified Otsu thresholding. Hyperfluorescent area of 30 angiographic images obtained from patients with leaking choroidal neovascularization (CNV) and diabetic retinopathy were evaluated and the results were compared with those obtained by an expert ophthalmologist.

Results : The best wavelet filter was determined. Quantitative assessment of the hyperfluorescent area showed a mean error of 0.12±0.59 square millimeters. There was no significant difference between algorithm-measured and ophthalmologist-measured area.

Conclusion : The proposed algorithm may be used to accurately measure area of hyperfluorescence.

  

  Iranian Journal of Ophthalmology 201022(4):73-79 © 2010 by the Iranian Society of Ophthalmology

Keywords: Wavelet, Age Related Macular Degeneration, Diabetes, Modified Otsu, Hyperfluorescence Region
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Type of Study: Original | Subject: General
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Ghasemi Falavarjani K, Mohammadreza H, Hejazi S M, Naseripour M. A Modified Semiautomatic Method for Measurement of Hyperfluorescence Area in Fluorescein Angiography. Iranian Journal of Ophthalmology. 2010; 22 (4) :73-79
URL: http://irjo.org/article-1-409-en.html


Volume 22, Issue 4 (Iranian Journal of Ophthalmology 2010) Back to browse issues page
مجله چشم پزشکی ایران Iranian Journal of Ophthalmology
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