Results 241 to 250 of about 558,722 (284)

In vivo cannulation of retinal vessels

Graefe's Archive for Clinical and Experimental Ophthalmology, 1987
In vivo cannulation of retinal blood vessels has not been reported but would be useful in exploring local vascular parameters and new treatment modalities. We developed a microsurgical technique for cannulating rabbit and cat retinal vessels, using glass micropipettes with curved shanks made from standard capillary tubing.
B E, Allf, E, de Juan
openaire   +2 more sources

Evaluation of Nonperfused Retinal Vessels in Ischemic Retinopathy [PDF]

, 2016
Purpose: Retinal ischemia has been traditionally assessed by fluorescein angiography, visualizing perfused vessels. However, this method does not provide any information about nonperfused vessels, and although it is often assumed that vessels in ischemic
Adnan Tufail, Dawn A Sim, Marcus Fruttiger   +2 more
exaly   +2 more sources

Retinal Vessel Dehydrogenase Enzymes

Archives of Ophthalmology, 1964
The isolation of the retinal vessels by the trypsin digestion technique 1 allows histochemical studies on this structure. Recently, histochemical studies of several enzyme groups, including the dehydrogenase enzymes, have been reported. 2 The present study is a more detailed study of these dehydrogenase enzymes in the rat, cat, and dog with nitro-blue ...
R, LEVENE, G, HORTON, R, EINAUGLER
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RETINAL VESSELS WHITENING IN RETINITIS PIGMENTOSA

Retina
Purpose: To characterize retinal vessel whitening (RVW) in retinitis pigmentosa (RP). Methods: Single-center cross-sectional study. Review of clinical notes of clinically confirmed patients with RP was performed followed by grading ultra-widefield imaging.
Shaden H. Yassin, Naomi E. Wagner, Fritz Gerald P. Kalaw, Paripoorna Sharma, Juan D. Arias, Melanie Tran, Ines Nagel, Evan Walker, Shyamanga Borooah   +8 more
openaire   +2 more sources

In vivo micropuncture of retinal vessels

Graefe's Archive for Clinical and Experimental Ophthalmology, 1993
Micropuncture has proven to be a valuable tool for the local study of vascular parameters in many organ systems; however, it has not been applied to the study of the circulation of the retina. We report here our extension of micropuncture techniques [4] to use in the intact retina of the anesthetized cat.
M R, Glucksberg, R, Dunn, C P, Giebs
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Retinal Vessels and Retinopathy of Prematurity

Archives of Ophthalmology, 2008
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Cheung, N, Liew, G, Jie, JW, Tien, YW
openaire   +3 more sources

Joining retinal vessel segments

2008 8th IEEE International Conference on BioInformatics and BioEngineering, 2008
A new method is introduced for joining vessel segments together to form a vessel graph. Using a reference image set from the Sunderland Eye Infirmary, we analysed the retinal bifurcation geometry, to define measurements for the geometrical junction features. These distinctive measurements are employed to resolve the junctions.
Bashir Al-Diri, Andrew Hunter, David H. Steel, Maged Habib   +3 more
openaire   +2 more sources

A Snake for Retinal Vessel Segmentation

2007
This paper presents an innovative methodology to detect the vessel tree in retinal angiographies. The automatic analysis of retinal vessel tree facilitates the computation of the arteriovenous index, which is essential for the diagnosis of a wide range of eye diseases.
Lucia Espona, María J. Carreira, Marcos Ortega 0001, Manuel G. Penedo   +3 more
openaire   +1 more source

Retinal Vessels in Down's Syndrome

Archives of Ophthalmology, 1973
The fundus vessels of 50 institutionalized mongols were compared with the fundus vessels of 50 sex-matched controls of similar age. Mongols appear to have significantly more retinal vessels crossing the margin of the optic nerve head. The high number of vessels is associated with an unusual, spoke-like appearance of the retinal vasculature and may be ...
E J, Williams, A Q, McCormick, B, Tischler   +2 more
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Probabilistic retinal vessel segmentation

SPIE Proceedings, 2007
Optic fundus assessment is widely used for diagnosing vascular and non-vascular pathology. Inspection of the retinal vasculature may reveal hypertension, diabetes, arteriosclerosis, cardiovascular disease and stroke. Due to various imaging conditions retinal images may be degraded.
Chang-Hua Wu, Gady Agam
openaire   +1 more source