Results 41 to 50 of about 143,576 (340)

Retinal vascular tortuosity in patients with obstructive sleep apnea-chronic obstructive pulmonary disease overlap syndrome

open access: yesEgyptian Journal of Chest Disease and Tuberculosis, 2018
Background Obstructive sleep apnea (OSA) and chronic obstructive pulmonary disease (COPD) are linked with microvascular changes. Retinal microvasculature can be examined in a direct noninvasive way.
Rabab A El Wahsh   +2 more
doaj   +1 more source

Mechanisms underlying microglial colonization of developing neural retina in zebrafish

open access: yeseLife, 2021
Microglia are brain-resident macrophages that function as the first line of defense in brain. Embryonic microglial precursors originate in peripheral mesoderm and migrate into the brain during development.
Nishtha Ranawat, Ichiro Masai
doaj   +1 more source

DUNet: A deformable network for retinal vessel segmentation

open access: yes, 2018
Automatic segmentation of retinal vessels in fundus images plays an important role in the diagnosis of some diseases such as diabetes and hypertension. In this paper, we propose Deformable U-Net (DUNet), which exploits the retinal vessels' local features
Chen, Qi   +5 more
core   +1 more source

Discordance in Retinal and Choroidal Vascular Densities in Patients with Type 2 Diabetes Mellitus on Optical Coherence Tomography Angiography

open access: yesJournal of Ophthalmology, 2021
Purpose. In the present study, the retinal and choroidal vascular densities (VDs) in type 2 diabetes mellitus (DM) patients were analyzed using optical coherence tomography angiography (OCTA). Methods.
Ho Ra   +5 more
doaj   +1 more source

Comparative Analysis of Vessel Segmentation Techniques in Retinal Images

open access: yesIEEE Access, 2019
The blood vessels are the primary anatomical structure that can be visible in retinal images. The segmentation of retinal blood vessels has been accepted worldwide for the diagnosis of both cardiovascular (CVD) and retinal diseases.
Azhar Imran   +4 more
doaj   +1 more source

Choroidal shift in myopic eyes in the 10-year follow-up Beijing eye study

open access: yesScientific Reports, 2021
The aim of the study was to assess longitudinal changes in the spatial relationship of the choroidal vasculature to retinal vasculature in myopic eyes.
Jost B. Jonas   +4 more
doaj   +1 more source

Retinal Vessel Segmentation Algorithm Based on Residual Convolution Neural Network

open access: yesFrontiers in Bioengineering and Biotechnology, 2021
Retinal vessels are the only deep micro vessels that can be observed in human body, the accurate identification of which has great significance on the diagnosis of hypertension, diabetes and other diseases.
Shuang Xu   +8 more
doaj   +1 more source

Impact of Retinal Vessel Image Coherence on Retinal Blood Vessel Segmentation

open access: yesElectronics, 2023
Retinal vessel segmentation is critical in detecting retinal blood vessels for a variety of eye disorders, and a consistent computerized method is required for automatic eye disorder screening. Many methods of retinal blood vessel segmentation are implemented, but these methods only yielded accuracy and lack of good sensitivity due to the coherence of ...
Alqahtani Saeed S   +8 more
openaire   +1 more source

WHAT IS THE BEST METHOD TO EVALUATE RETINAL MICROCIRCULATION?

open access: yesArtery Research, 2015
The microvasculature of retinal ganglion cell layer, which is the part of central nervous system, can be investigated non-invasively in human. For clinical routine the fluorescence angiography is used to test patency and leak of retinal or choroid ...
Joanna Harazny
doaj   +1 more source

Differential intensity contrast swept source optical coherence tomography for human retinal vasculature visualization [PDF]

open access: yes, 2012
We demonstrate an intensity-based motion sensitive method, called differential logarithmic intensity variance (DLOGIV), for 3D microvasculature imaging and foveal avascular zone (FAZ) visualization in the in vivo human retina using swept source optical ...
Fraser, Scott, Motaghiannezam, Reza
core   +1 more source

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