نتایج جستجو برای: enhanced depth imaging optical coherence tomography

تعداد نتایج: 1297510  

2003
Brian R. White Mark C. Pierce Nader Nassif Barry Cense B. Hyle Park Guillermo J. Tearney Brett E. Bouma Teresa C. Chen Johannes F. de Boer Y. H. Zhao Z. P. Chen C. Saxer Q. M. Shen S. H. Xiang A. M. Rollins S. Yazdanfar J. K. Barton J. A. Izatt

An ultra-high-speed spectral domain optical Doppler tomography (SD-ODT) system is used to acquire images of blood flow in a human retina in vivo, at 29,000 depth profiles (A-lines) per second and with data acquisition over 99% of the measurement time. The phase stability of the system is examined and image processing algorithms are presented that allow accurate determination of bi-directional D...

Journal: :Ophthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift fur Augenheilkunde 2016
Ebru Esen Selcuk Sizmaz Turgay Demir Meltem Demirkiran Ilker Unal Nihal Demircan

have been reported in the text. The authors have wondered whether there is a significant difference between the three groups (control, MS ON and MS non-ON). As we have mentioned in detail in the article, both MS ON and MS non-ON eyes had significantly reduced average-RNFL thickness measurements when compared with healthy controls, and the average-RNFL thickness measurements in MS ON eyes were s...

2012
Abdallah A Ellabban Akitaka Tsujikawa Ken Ogino Sotaro Ooto Kenji Yamashiro Akio Oishi Nagahisa Yoshimura

PURPOSE To study changes in choroidal thickness with ranibizumab treatment for choroidal neovascularization (CNV). DESIGN Prospective case series. METHODS This prospective study consisted of 60 CNV-affected eyes of 60 patients treated with intravitreal injections of ranibizumab using an on-demand protocol after an initial loading phase. The eyes studied included 20 with age-related macular ...

2014
Solmaz Abdolrahimzadeh Lorenzo Felli Domenica Carmen Piraino Roberto Mollo Stefano Calvieri Santi Maria Recupero

BACKGROUND Neurofibromatosis type 1 (NF1) is an autosomal dominant disorder involving aberrant proliferation of multiple tissues of neural crest origin. Retinal vascular alterations in NF1 have rarely been reported in the literature and their nature is not clear. This study describes distinctive retinal microvascular alterations and their relationship to choroidal nodules in patients with neuro...

2017
Geun Young Lee Sung Yu Hyun Gu Kang Jin Seon Kim Kyoo Won Lee Jung-Ho Lee

PURPOSE To assess choroidal thickness (CT) variation according to refractive errors using enhanced-depth imaging optical coherence tomography. METHODS Eighty-nine eyes (in 89 children) <±6 diopter were categorized into three groups: hyperopia, emmetropia, and myopia, according to refractive error, and underwent choroidal scans using enhanced-depth imaging-optical coherence tomography. CT was ...

Journal: :BMC ophthalmology 2015
Erhan Yumusak Aydin Ciftci Selim Yalcin Cemile Dayangan Sayan Nevin Hande Dikel Kemal Ornek

BACKGROUND The aim of this study was to investigate the potential significance of the central macular thickness (foveal thickness-FT) and choroidal thickness (CT) in the eyes of patients with iron-deficiency anemia, the most common form of the anemia, via enhanced-depth imaging optical coherence tomography (EDI-OCT). We also investigated whether such changes might serve as an early indicator of...

2011
C. G. Song K. S. Kim M. H. Kim S. H. Ryu J. H. Seo

Conventional optical coherence tomography (OCT) systems generally have a limited imaging range within a depth of only 1-2 mm and suffers from unwanted noise such as speckle, ghost or mirror noise. To overcome these limitations, we developed a motorized-stage-based OCT system with an extended imaging range, using a common-path Fourier-domain optical coherence tomography (CP-FD-OCT) configuration...

Journal: :Optics express 2011
Jonas Binding Juliette Ben Arous Jean-François Léger Sylvain Gigan Claude Boccara Laurent Bourdieu

Two-photon laser scanning microscopy (2PLSM) is an important tool for in vivo tissue imaging with sub-cellular resolution, but the penetration depth of current systems is potentially limited by sample-induced optical aberrations. To quantify these, we measured the refractive index n' in the somatosensory cortex of 7 rats in vivo using defocus optimization in full-field optical coherence tomogra...

Journal: :Acta ophthalmologica 2015
Marco Beck Bettina Schlatter Sebastian Wolf Martin S Zinkernagel

PURPOSE Senile scleral plaques (SSP) are sharply demarcated greyish areas located just anterior to the insertions of the horizontal rectus muscles and thus are frequently encountered during transscleral intravitreal injections. The aim of this study was to characterize SSP using enhanced depth imaging spectral domain anterior segment optical coherence tomography (OCT) in a cohort of patients at...

Journal: :Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society 2015
Marwan A Abouammoh

Central serous chorioretinopathy is a disease that is partly understood. Novel advancements have led to further understanding of the disease, and have identified choroidal dysfunction as the principal element in CSCR development. New imaging tools have aided in better monitoring disease response to various treatment models. Enhanced depth imaging optical coherence tomography, in particular, has...

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