نتایج جستجو برای: optical tomography

تعداد نتایج: 426255  

امجدی, احمد, قاسمی فلاورجانی, خلیل, معظمی گودرزی, نیلوفر,

In fourier domain optical coherence tomography, we can measure the optical thickness ( refractive index n times thickness d), to obtain the retinal layers in order to diagnose many disorders. In this work, we introduce a new method for measurement of refractive index and physical thickness of multiple layers simultaneously by Fourier domain optical coherence tomography, without additional infor...

Journal: :بینا 0
مرتضی انتظاری m entezari ophthalmic epidemiology research center, shahid beheshti university of medical sciencesمرکز تحقیقات اپیدمیولوژی بیماری های چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران مصطفی اسداللهی m asadollahi ophthalmic epidemiology research center, shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران محمدحسن سیفی mh seifi ophthalmic epidemiology research center, shahid beheshti university of medical sciencesمرکز تحقیقات چشم- دانشگاه علوم پزشکی شهید بهشتی- تهران- ایران رضا هداوند r hadavand department of neurology, imam hossein hospital, shahid beheshti university of medical sciences, tehran, iranبیمارستان امام حسین تهران- تهران- ایران ناهید بلادی مقدم beladi moghadam shahid beheshti university of medical sciencesدانشگاه علوم پزشکی شهید بهشتی- تهران- ایران

purpose: to compare peripapillary retinal nerve fiber layer (rnfl) thickness among multiple sclerosis (ms) patients with or without a history of optic neuritis (on) and a healthy control group. methods: in this retrospective case-control study, 59 ms patients were recruited from a neurology clinic of imam hossein hospital. of which, 36 patients had at least one episode of on and 23 others had n...

Journal: :The Polish Journal of Aviation Medicine, Bioengineering and Psychology 2023

Abstract: Optical coherence tomography is a non-invasive method of imagining the anterior and posterior segment eye. It commonly used in ophthalmic practice to diagnose monitor various pathologies eyeball. angiography (OCTA) useful tool visualize entire retinal choroidal microvasculature, allowing assessment perfusion without intravenous dye administration.

Journal: :Optics and Photonics News 1997

Journal: :The International Conference on Mathematics and Engineering Physics 2008

Journal: :medical hypothesis, discovery and innovation ophthalmology journal 0
sã­lvia mendes ophthalmology department - leiria hospital centre, portugal antã³nio campos ophthalmology department - leiria hospital centre, portugal joana campos ophthalmology department - leiria hospital centre, portugal arminda neves ophthalmology department - leiria hospital centre, portugal diana beselga ophthalmology department - leiria hospital centre, portugal cristina fernandes ophthalmology department - leiria hospital centre, portugal

this article reviews clinically relevant data regarding traumatic maculopathy (tm), frequently observed in clinical practice, especially due to sport or traffic accident injuries. it is characterized by transient gray-whitish retinal coloration and reduction of visual acuity (va) with closed, blunt object globe trauma of their prior. it may be limited to the posterior pole (berlin’s edema), o...

Journal: :Microscopy Today 2002

Journal: :Metrology and instruments 2020

Journal: :THE JOURNAL OF JAPAN SOCIETY FOR LASER SURGERY AND MEDICINE 2000

A.-R. Zirak, M. Khademi, M.-S. Mahloji,

We present an efficient method for the reduction of model equations in the linearized diffuse optical tomography (DOT) problem. We first implement the maximum a posteriori (MAP) estimator and Tikhonov regularization, which are based on applying preconditioners to linear perturbation equations. For model reduction, the precondition is split into two parts: the principal components are consid...

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