نتایج جستجو برای: optical coherence tomography oct

تعداد نتایج: 482818  

Introduction: Different approaches have been developed to find the position of the internal auditory canal (IAC)in middle cranial fossa approach. A feasibility study was performed to investigate the combination of cone beam computed tomography (CBCT), optical coherence tomography (OCT), and laser ablation to assist a surgeon in a middle cranial fossa approach by outlining the internal auditory ...

Journal: :iranian journal of otorhinolaryngology 0
saleh mohebbi brain and spinal cord injury research center, neuroscience institute, tehran university of medical science, tehran, iran. marjan mirsalehi brain and spinal cord injury research center, neuroscience institute, tehran university of medical science, tehran, iran. lüder-alexander kahrs institute of mechatronic systems, leibniz university hannover, hannover, germany. tobias ortmaier institute of mechatronic systems, leibniz university hannover, hannover, germany. thomas lenarz department of otorhinolaryngology, hannover medical school, hannover, germany. omid majdani department of otorhinolaryngology, hannover medical school, hannover, germany.

introduction:visualization of inner ear structures is a valuable strategy for researchers and clinicians working on hearing pathologies. optical coherence tomography (oct) is a high-resolution imaging technology which may be used for the visualization of tissues. in this experimental study we aimed to evaluate inner ear anatomy in well-prepared human labyrinthine bones.materials and methods:thr...

Journal: :Optics letters 1997
J A Izatt M D Kulkarni S Yazdanfar J K Barton A J Welch

We describe a novel optical system for bidirectional color Doppler imaging of flow in biological tissues with micrometer-scale resolution and demonstrate its use for in vivo imaging of blood flow in an animal model. Our technique, color Doppler optical coherence tomography (CDOCT), performs spatially localized optical Doppler velocimetry by use of scanning low-coherence interferometry. CDOCT is...

Journal: :journal of current ophthalmology 0
خلیل قاسمی فلاورجانی khalil ghasemi falavarjani ژوبین خادمی joobin khadamy ناصر کریمی nasser karimi انیس السادات جزایری anis alsadat jazayeri فواد امیرکورجانی foad amirkourjani

purpose: to evaluate the rate of optical coherence tomography (oct) grid decentration in a routine practice and its effect on thickness measurements methods: topcon spectral domain oct scans from various macular diseases including age related macular degeneration, diabetic macular edema, macular pucker and central serous chorioretinopathy (cscr) were studied in all patients visited during seven...

2017
Magdy Moussa Mahmoud Leila Hagar Khalid

PURPOSE The aim of this study was to assess the efficacy of swept-source optical coherence tomography angiography (SS-OCTA) in delineating the morphology of choroidal neovascular membrane (CNV). PATIENTS AND METHODS This was a retrospective observational case series reviewing clinical data and fundus fluorescein angiography (FFA), swept-source optical coherence tomography (SS-OCT), and SS-OCT...

Journal: :Optics express 2010
Stefan Kray Felix Spöler Thomas Hellerer Heinrich Kurz

Electronically controlled coherent linear optical sampling for low coherence interferometry (LCI) and optical coherence tomography (OCT) is demonstrated, using two turn-key commercial mode-locked fiber lasers with synchronized repetition rates. This novel technique prevents repetition rate limitations present in previous implementations based on asynchronous optical sampling. Adjustable scannin...

ژورنال: بینا 2019
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Purpose: To report a case of peripapillary intrachoroidal cavitation (choroidal schisis) and optic pit in a case of high myopia and open-angle glaucoma. Case report: A 30-year-old high myopic man was referred to our clinic for presumed peripapillary choroidal tumors. In funduscopy, there were two yellow-orange and slightly elevated peripapillary lesions in both eyes with indistinct margins. A s...

Journal: :American heart journal 2015
Francesco Prati Takahide Kodama Enrico Romagnoli Laura Gatto Luca Di Vito Vito Ramazzotti Alberto Chisari Valeria Marco Alberto Cremonesi Guido Parodi Mario Albertucci Fernando Alfonso

BACKGROUND Acute or subacute stent thrombosis (ST) is a well-described complication usually causing acute coronary syndromes and, in the worst case scenario, sudden cardiac death. In this study, we aimed at exploring the potential role of optical coherence tomography (OCT) in the understanding of the mechanism of ST. METHODS Twenty-one consecutive patients, after acute coronary syndromes due ...

Journal: :International Journal of Biomedical Imaging 2008
Luc Froehly Malha Ouadour Luca Furfaro Patrick Sandoz Philippe Leproux Guillaume Huss Vincent Couderc

Spectroscopic optical coherence tomography (spectroscopic OCT) is an echographic-like optical method for biomedical functional imaging. Current spectroscopic optical coherence tomography (OCT) methods rely on a posteriori numerical calculation. We present an alternative for optically accessing the spectroscopic information in OCT, that is, without postprocessing, by using a grating-based correl...

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