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A Modified Semiautomatic Method for Measurement of Hyperfluorescence Area in Fluorescein Angiography
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نویسنده
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Ghasemi Falavarjani Khalil ,Mohammadreza Hanieh ,Hejazi Sedigheh Marjaneh ,Naseripour Masood
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منبع
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journal of current ophthalmology - 2010 - دوره : 22 - شماره : 4 - صفحه:73 -79
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چکیده
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Purpose: to offer a semi-automatic algorithm to determine the area of angiographic hyperfluorescencemethods: 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.
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کلیدواژه
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Wavelet ,Age Related Macular Degeneration ,Diabetes ,Modified Otsu ,Hyperfluorescence Region
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آدرس
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tehran university of medical sciences tums, Rassoul Akram Hospital, Eye Research Center, ایران, tehran university of medical sciences tums, Research Center for Sciences and Technology in Medicine, ایران, tehran university of medical sciences tums, Research Center for Sciences and Technology in Medicine, ایران, iran university of medical sciences, Rassoul Akram Hospital, Eye Research Center, ایران
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پست الکترونیکی
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mhejazi@sina.tums.ac.ir
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Authors
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