Results 101 to 110 of about 921,622 (398)

Pattern of Retinal Nerve Fiber Layer Thickness Loss in Fetal Alcohol Syndrome: A Spectral-Domain Optical Coherence Tomography Analysis

Acta Médica Portuguesa, 2016
Introduction: Optic disc hypoplasia is a common feature in fetal alcohol syndrome. Thus, we aimed to evaluate the optic disc morphology changes and the peripapillary retinal nerve fiber layer thickness in these patients.
Carlos Menezes, Isabel Ribeiro, Pedro Coelho, Catarina Mateus, Carla Teixeira   +4 more
doaj   +1 more source

Identifying Those at Risk of Glaucoma: A Deep Learning Approach for Optic Disc and Cup Segmentation and Their Boundary Analysis

Diagnostics, 2022
Glaucoma is a leading cause of irreversible vision loss that gradually damages the optic nerve. In ophthalmic fundus images, measurements of the cup to optic disc (CD) ratio, CD area ratio, neuroretinal rim to optic disc (RD) area ratio, and rim ...
Jongwoo Kim, Loc Tran, Tunde Peto, Emily Y. Chew   +3 more
doaj   +1 more source

Time-dependent models of two-phase accretion discs around black holes [PDF]

Mon.Not.Roy.Astron.Soc.376:435-456,2007, 2006
We present time-dependent simulations of a two-phase accretion flow around a black hole. The accretion flow initially is composed of an optically thick and cool disc close to the midplane, while on top and below the disc there is a hot and optically thin corona. We consider several interaction mechanisms as heating of the disc by the corona and Compton
arxiv   +1 more source

Pseudo-Foster Kennedy Syndrome due to unilateral optic nerve hypoplasia: a case report [PDF]

, 2008
Introduction Pseudo-Foster Kennedy Syndrome is described as unilateral optic disc swelling with contralateral optic atrophy in the absence of an intracranial mass causing compression of the optic nerve.
EW Massey, J Primrose, L Frisen, N Shatz, RL Watnick, Shveta Bansal, Timothy Dabbs, Vernon Long   +7 more
core   +3 more sources

A large‐scale retrospective study in metastatic breast cancer patients using circulating tumour DNA and machine learning to predict treatment outcome and progression‐free survival

Molecular Oncology, EarlyView.
There is an unmet need in metastatic breast cancer patients to monitor therapy response in real time. In this study, we show how a noninvasive and affordable strategy based on sequencing of plasma samples with longitudinal tracking of tumour fraction paired with a statistical model provides valuable information on treatment response in advance of the ...
Emma J. Beddowes, Mario Ortega Duran, Solon Karapanagiotis, Alistair Martin, Meiling Gao, Riccardo Masina, Ramona Woitek, James Tanner, Fleur Tippin, Justine Kane, Jonathan Lay, Anja Brouwer, Stephen‐John Sammut, Suet‐Feung Chin, Davina Gale, Dana W. Y. Tsui, Sarah‐Jane Dawson, Nitzan Rosenfeld, Maurizio Callari, Oscar M. Rueda, Carlos Caldas   +20 more
wiley   +1 more source

Radial optic neurotomy as a treatment for anterior ischemic optic neuropathy secondary to optic disc drusen

GMS Ophthalmology Cases, 2014
[english] Importance: Radial optic neurotomy (RON) was first described by Opremcak as a treatment for patients with central retinal vein occlusion (CRVO).
Pinxten, Isabel, Stalmans, Peter
doaj   +1 more source

Prevalence of optic disc hemorrhages in rural central India. The Central Indian Eye and Medical Study. [PDF]

PLoS ONE, 2013
PURPOSE: To determine the frequency of optic disc hemorrhages in a rural Indian population. METHODS: The population-based Central Indian Eye and Medical Study included 4711 subjects. Mean age was 48.5±12.9 years (range: 30-100 years).
Jost B Jonas, Vinay Nangia, Anshu Khare, Maithili Kulkarni, Arshia Matin, Ajit Sinha, Krishna Bhojwani, Prabhat Nangia, Songhomitra Panda-Jonas   +8 more
doaj   +1 more source

The origin and evolution of transition discs: successes, problems and open questions [PDF]

, 2015
Transition discs are protoplanetary discs that show evidence for large holes or wide gaps (with widths comparable to their radii) in their dust component. These discs could be giving us clues about the disc destruction mechanism or hints about the location and time-scales for the formation of planets. However, at the moment there remain key gaps in our
arxiv   +1 more source

Demographics of Transition Objects [PDF]

Mon.Not.Roy.Astron.Soc.378:369-378,2007, 2007
The unusual properties of transition objects (young stars with an optically thin inner disc surrounded by an optically thick outer disc) suggest that significant disc evolution has occured in these systems. We explore the nature of these systems by examining their demographics, specifically their stellar accretion rates (Mdot) and disc masses (Mdisc ...
arxiv   +1 more source

Optic Disc and Cup Segmentation in Retinal Images for Glaucoma Diagnosis by Locally Statistical Active Contour Model with Structure Prior

Comput. Math. Methods Medicine, 2019
Accurate optic disc and optic cup segmentation plays an important role for diagnosing glaucoma. However, most existing segmentation approaches suffer from the following limitations. On the one hand, image devices or illumination variations always lead to
W. Zhou, Yugen Yi, Yuan Gao, Jiangyan Dai   +3 more
semanticscholar   +1 more source