نتایج جستجو برای: retinal

تعداد نتایج: 81049  

In this paper we consider the problem of blood vessel segmentation in retinal images. After enhancing the retinal image we use green channel of images for segmentation as it provides better discrimination between vessels and background. We consider the negative of retinal green channel image as a topographical surface and extract ridge points on this surface. The points with this property are l...

Journal: :journal of current ophthalmology 0
مسعود ناصری پور masood naseripour حسین نظری hossein nazari پژمان بختیاری pejman bakhtiari علی احدیان ali ahadian رامین جابری ramin jaberi

purpose: to evaluate the effect of radiation with ruthenium-106 (ru-106) plaques in the control of retinal vasoproliferative tumors methods: this study is a retrospective, interventional nonrandomized case series. seven eyes of seven patients (four males and three females) with retinal vasoproliferative tumors were enrolled. the eyes were treated by ru-106 plaques with mean apex dose of 39 gy (...

بیداری, علی, صبا, محمدعلی, سلطان سنجری, مصطفی, احمدی, فریده ,

Chloroquine and its congeners are antimalarial agents which have anti rheumatic properties. One of the most important side effects of these drugs is retinal toxicity. Different methods have been used for early detection of this complication but there is no firm consensus about the best one. The purpose of this study was to assess the value of central 2-10 perimetry in early detect...

مدرس‌زاده, سیدمهدی, نیک‌اقبالی, امین‌ا…, هاشمی, مسیح, میرصمدی, میرمنصور ,

 Prevention of rhegmatogenous retinal detachment (RD) in susceptable eyes is necessary. In order to evaluate the role of signs and symptoms of the treated eyes in preventing RD, this study performed in prophylactically laser treated (PLT) eyes in Rasul-e Akram Hospital from 1991 to 1999.  This is an exisiting data study from the records of the patients who underwent PLT around the retinal lesio...

Akramsadat Tabasi Majid Asadi Shekari, Mehdi Mehdizadeh, Mohammad Jafar Golalipour, Soraya Ghafari

Objective(s): The Muller cell is the principal glial cell of the vertebrate retina. The expression of Glial fibrillary acidic protein (GFAP) in the Muller cells was used as a cellular marker for retinal damage. This study was done to evaluate the effect of gestational diabetes on retinal Muller cells in rat's offspring. Materials and Methods: In this experimental study, 12 Wistar rat dams were ...

ژورنال: بینا 2019
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Purpose: To Report a case of blindness due to hyaluronic acid filler injection. Case Report: A 28-year-old female patient was referred to our clinic with complaints of vision loss in the left eye, which occurred one hour after hyaluronic acid filler injection for correction of detachment trough hollowness. In the ophthalmologic examination, relative afferent pupillary defect (RAPD) was positive...

Background and Aim: Many causes of blindness or vision impairment are treatable, and their irreversible complications can be prevented by early diagnosis and proper treatment. Thus, the current study aimed at investigating the epidemiology of various eye diseases in patients (i.e.760 cases) referring to the ophthalmic clinic of Vali-e-Asr hospital in Birjand (Dec.22, 2014-Jun 20, 2015). Materi...

This paper presents an automated method for detecting microaneurysms in the retinal angiographic images by using image processing techniques. In the presented method, in order to fade or remove the pseudo images, first retinal images are pre-processed. Then microaneurysms are identified by circular Hough transform. In the existing methods of dete...

Journal: Surgery and Trauma 2016

Introduction: Intravitreal Avastin (bevacizumab) injection is reportedly accompanied by ocular and systemic side-effects. Our enquiry assesses whether there are any differences between intraocular pressure (IOP) in baseline and on the day after injection in patients treated for retinal disease. Methods: In this experimental study, 82 eyes with retinal diseases that had indication for anti-VEGF...

Background: Central retinal vein occlusion (CRVO) is the second most common retinal vascular disorder after diabetic retinopathy. In this study, we tried to examine the potentials of time-frequency methods for differentiating the eyes with CRVO. Materials and methods: Twenty patients with unilateral CRVO were included in this study. Their contralateral normal eyes were considered as the control...

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