نتایج جستجو برای: optical coherence

تعداد نتایج: 314691  

Journal: :Ophthalmic surgery, lasers & imaging : the official journal of the International Society for Imaging in the Eye 2003
David Huang Mark Shure

This paper shows the technique of optical coherence tomography in the frequency domain Handbook of Optical Coherence Tomography, MarcelDekker. Simulation of polarized OCT signal is performed using vector approach V. V. Tuchin, Handbook of Coherent Domain Optical Methods: Biomedical Diagnostics. In a little over two decades, optical coherence tomography (OCT) has become an indispensable imaging ...

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: :American journal of ophthalmology 1995
M R Hee C A Puliafito C Wong E Reichel J S Duker J S Schuman E A Swanson J G Fujimoto

PURPOSE To assess the potential of a new imaging technique, optical coherence tomography, for the diagnosis and monitoring of central serous chorioretinopathy. Optical coherence tomography is a novel noninvasive, noncontact imaging modality that produces high longitudinal resolution, cross-sectional tomographs of ocular tissue. METHODS Optical coherence tomography is analogous to ultrasound, ...

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.

رهبر, کامبیز, فائز, کریم,

The quality of the image formed by an optical system is reduced by aberrations. This paper points out and attempts to correct blindness of lens aberration. Therefore modified Zernike moments were introduced to present lens aberration model within which their coefficients were estimated through poly-spectral analysis. The model parameters are divided into asymmetric and symmetric which are estim...

Journal: :Applied Physics Letters 2021

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

Journal: :The Journal of laryngology and otology 2009
T Just E Lankenau G Hüttmann H W Pau

OBJECTIVE To introduce the use of optical coherence tomography with an operating microscope for intra-operative evaluation of the human larynx. METHODS A specially equipped operating microscope with integrated spectral domain optical coherence tomography apparatus was used during microlaryngoscopy. RESULTS Technical improvements in optical coherence tomography equipment (e.g. pilot beam, va...

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...

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