نتایج جستجو برای: enhanced depth imaging optical coherence tomography

تعداد نتایج: 1297510  

Journal: :Optics express 2008
Utkarsh Sharma Ernest W Chang Seok H Yun

Multiple scattering in a sample presents a significant limitation to achieve meaningful structural information at deeper penetration depths in optical coherence tomography (OCT). Previous studies suggest that the spectral region around 1.7 microm may exhibit reduced scattering coefficients in biological tissues compared to the widely used wavelengths around 1.3 mum. To investigate this long-wav...

Journal: :Investigative ophthalmology & visual science 2014
Alexandra Pierru Michel Carles Pierre Gastaud Stéphanie Baillif

PURPOSE To compare subfoveal choroidal thickness (SFCT) before and after uneventful cataract surgery using enhanced depth imaging optical coherence tomography (EDI-OCT). METHODS A prospective study was conducted on 115 eyes of 95 patients who had phacoemulsification. Measurements of SFCT were performed preoperatively, 1 day (D1), 7 days (D7), 1 month (M1), and 3 months (M3) after surgery usin...

2016
Susana Costa Penas António Augusto Magalhães Jorge Ribeiro Breda Francisco Miguel Cruz Elisete Maria Brandão Fernando Falcão Reis

Introduction: Hunter syndrome or mucopolysaccharidosis type II is a rare progressive multi-systemic disorder, caused by an abnormal storage of glycosaminoglycans (GAGs) in almost every cell type, including most ocular tissues [1,2]. Patients have a short life expectancy and ocular manifestations can be present early in the course of disease [1,2]. Purpose: To report the fundus autofluorescence ...

Journal: :Arquivos brasileiros de oftalmologia 2014
Saban Gonul Banu Turgurt Ozturk Suleyman Okudan

PURPOSE To investigate choroidal thickness in healthy pregnant women during different trimesters using enhanced depth imaging optical coherence tomography (EDI-OCT). METHODS This prospective study included 90 healthy pregnant women in their first, second, or third trimester (groups 1, 2, and 3, respectively) and 30 non-pregnant healthy women (group 4). The age range for all groups was 18-40 y...

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 ...

Journal: :Optics letters 2001
A Wax C Yang R R Dasari M S Feld

We present a novel interferometer for measuring angular distributions of backscattered light. The new system exploits a low-coherence source in a modified Michelson interferometer to provide depth resolution, as in optical coherence tomography, but includes an imaging system that permits the angle of the reference field to be varied in the detector plane by simple translation of an optical elem...

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