Results 41 to 50 of about 712,500 (261)

Retinal oximetry [PDF]

Acta Ophthalmologica, 2013
Abstract.Purpose:Malfunction of retinal blood flow or oxygenation is believed to be involved in various diseases. Among them are retinal vessel occlusions, diabetic retinopathy and glaucoma. Reliable, non‐invasive technology for retinal oxygen measurements has been scarce and most of the knowledge on retinal oxygenation comes from animal studies.
openaire   +5 more sources

Microscopic Inner Retinal Hyper-reflective Phenotypes in Retinal and Neurologic Disease [PDF]

, 2014
Purpose. We surveyed inner retinal microscopic features in retinal and neurologic disease using a reflectance confocal adaptive optics scanning light ophthalmoscope (AOSLO). Methods. Inner retinal images from 101 subjects affected by one of 38 retinal or
Carroll, Joseph, Cooper, Robert F., Dubis, Adam M., Dubra, Alfredo, Higgins, Brian P., Kim, Judy E., Scoles, Drew, Stepien, Kimberly E., Summerfelt, Phyllis, Weinberg, David V.   +9 more
core   +2 more sources

Retinal prostheses in degenerative retinal diseases

Journal of the Chinese Medical Association, 2015
Degenerative retinal diseases may lead to significant loss of vision. Age-related macular degeneration (AMD) and retinitis pigmentosa (RP), which eventually affect the photoreceptors, are the two most common retinal degenerative diseases. Once the photoreceptorcells are lost, there are no known effective therapies for AMD or RP.
Shih-Jen Chen, Yan-Ting Chen, Yan-Ting Chen, Chih Chien Hsu, Chih Chien Hsu, Hua Ming Chang, Kuo Hsuan Hung, Szu Yu Chen, Tai Chi Lin, Tai Chi Lin   +9 more
openaire   +3 more sources

Interactive Blood Vessel Segmentation from Retinal Fundus Image Based on Canny Edge Detector

Sensors, 2021
Optometrists, ophthalmologists, orthoptists, and other trained medical professionals use fundus photography to monitor the progression of certain eye conditions or diseases. Segmentation of the vessel tree is an essential process of retinal analysis.
Alexander Ze Hwan Ooi, Zunaina Embong, Aini Ismafairus Abd Hamid, Rafidah Zainon, Shir Li Wang, Theam Foo Ng, Rostam Affendi Hamzah, Soo Siang Teoh, Haidi Ibrahim   +8 more
doaj   +1 more source

Segmentation of Retinal Blood Vessels Using Deep Learning [PDF]

arXiv, 2023
The morphology of retinal blood vessels can indicate various diseases in the human body, and researchers have been working on automatic scanning and segmentation of retinal images to aid diagnosis. This project compares the performance of four neural network architectures in segmenting retinal images, using a combined dataset from different databases ...
arxiv  

Differential Expression of the Demosponge (Suberites domuncula) Carotenoid Oxygenases in Response to Light: Protection Mechanism Against the Self-Produced Toxic Protein (Suberitine)

Marine Drugs, 2012
The demosponge Suberites domuncula has been described to contain high levels of a proteinaceous toxin, Suberitine, that displays haemolytic activityIn the present study this 7–8 kDa polypeptide has been isolated and was shown to exhibit also cytotoxic ...
Heinz C. Schröder, Matthias Wiens, Werner E. G. Müller, Xiaohong Wang, Michael Binder, Johannes von Lintig   +5 more
doaj   +1 more source

Impaired endothelial function of the retinal vasculature in hypertensive patients [PDF]

, 2004
<p><b>Background and Purpose:</b> Arterial hypertension constitutes a central factor in the pathogenesis of stroke. We examined endothelial function of the retinal vasculature as a model of the cerebral circulation.</p> <p ...
Delles, C., Harazny, J., Hilgers, K.F., Michelson, G., Oehmer, S., Schmieder, R.E.   +5 more
core   +1 more source

Monitoring retinal changes with optical coherence tomography predicts neuronal loss in experimental autoimmune encephalomyelitis. [PDF]

, 2019
BACKGROUND:Retinal optical coherence tomography (OCT) is a clinical and research tool in multiple sclerosis, where it has shown significant retinal nerve fiber (RNFL) and ganglion cell (RGC) layer thinning, while postmortem studies have reported RGC loss.
Aktas, Orhan, Albrecht, Philipp, Balk, Lisanne J, Cordano, Christian, Cruz-Herranz, Andrés, Dietrich, Michael, Fischer, Dietmar, Green, Ari J, Hallenberger, Angelika, Hartung, Hans-Peter, Hecker, Christina, Hilla, Alexander M, Ingwersen, Jens, Issberner, Andrea, Lehmann-Horn, Klaus, Levin, Marc H, von Gall, Charlotte, Yiu, Hao H, Zamvil, Scott S   +18 more
core   +1 more source

Functional Imaging of the Outer Retinal Complex using High Fidelity Imaging Retinal Densitometry [PDF]

, 2020
We describe a new technique, high fidelity Imaging Retinal Densitometry (IRD), which probes the functional integrity of the outer retinal complex. We demonstrate the ability of the technique to map visual pigment optical density and synthesis rates in ...
Atkinson, D., Binns, A. M., Fergusson, J., Gaffney, A. J., Henry, D., Jones, C., Lamb, T. D., Margrain, T. H., Melotte, D., Miller, C., Todd, S., Wood, A.   +11 more
core   +3 more sources

Automated segmentation of retinal fluid volumes from structural and angiographic optical coherence tomography using deep learning [PDF]

, 2020
Purpose: We proposed a deep convolutional neural network (CNN), named Retinal Fluid Segmentation Network (ReF-Net) to segment volumetric retinal fluid on optical coherence tomography (OCT) volume. Methods: 3 x 3-mm OCT scans were acquired on one eye by a 70-kHz OCT commercial AngioVue system (RTVue-XR; Optovue, Inc.) from 51 participants in a clinical ...
arxiv   +1 more source