Results 21 to 30 of about 3,008,306 (295)

Retinal vessel segmentation using the 2-D Gabor wavelet and supervised classification [PDF]

, 2006
—We present a method for automated segmentation of the vasculature in retinal images. The method produces segmentations by classifying each image pixel as vessel or nonvessel, based on the pixel’s feature vector. Feature vectors are composed of the pixel’
Michael J. Cree, João V. B. Soares, Herbert F. Jelinek, Cesar, R.M., Jr., Jorge J. G. Le, Senior Member, Roberto M. Cesar, Jelinek, H.F., Soares, J.V.B., Leandro, J.J.G., Cree, Michael J.   +10 more
core   +1 more source

Optical coherence tomography angiography vessel density in children with type 1 diabetes. [PDF]

PLoS ONE, 2017
To assess the optical coherence tomography angiography (OCTA) retinal vessel density and foveal avascular zone (FAZ) in children with type 1 diabetes (T1D) and compare potential pathologic early changes in this population to healthy age-matched controls ...
Joanna Gołębiewska, Andrzej Olechowski, Marta Wysocka-Mincewicz, Dominik Odrobina, Marta Baszyńska-Wilk, Artur Groszek, Mieczysław Szalecki, Wojciech Hautz   +7 more
doaj   +1 more source

Structural network efficiency is associated with cognitive impairment in small-vessel disease. [PDF]

, 2014
To characterize brain network connectivity impairment in cerebral small-vessel disease (SVD) and its relationship with MRI disease markers and cognitive impairment.METHODS: A cross-sectional design applied graph-based efficiency analysis to deterministic
Lawrence, AJ, A. W. Chung, T. R. Barrick, Chung, AW, Barrick, Thomas R., Lawrence, Andrew J.; id_orcid, A. J. Lawrence, H. S. Markus, Morris, RG, Morris, Robin G., Barrick, TR, Chung, Ai Wern, R. G. Morris, Markus, Hugh S., Markus, HS   +14 more
core   +1 more source

Optical Coherence Tomography Angiography-Based Quantitative Assessment of Morphologic Changes in Active Myopic Choroidal Neovascularization During Anti-vascular Endothelial Growth Factor Therapy

Frontiers in Medicine, 2021
Purpose: To establish quantitative profile of the morphologic changes among patients with active myopic choroidal neovascularization (mCNV) before and after anti-vascular endothelial growth factor (VEGF) therapy using optical coherence tomography ...
Yao Wang, Zhongli Hu, Tiepei Zhu, Zhitao Su, Xiaoyun Fang, Jijian Lin, Zhiqing Chen, Zhaoan Su, Panpan Ye, Jian Ma, Li Zhang, Jinyu Li, Lei Feng, Chuan-bin Sun, Zhiyong Zhang, Xingchao Shentu   +15 more
doaj   +1 more source

Trainable COSFIRE filters for vessel delineation with application to retinal images [PDF]

, 2015
Retinal imaging provides a non-invasive opportunity for the diagnosis of several medical pathologies. The automatic segmentation of the vessel tree is an important pre-processing step which facilitates subsequent automatic processes that contribute to ...
Petkov, Nicolai, Azzopardi, George
core   +1 more source

Quantitative analysis of conjunctival microvasculature imaged using optical coherence tomography angiography

Eye and Vision, 2019
Background The goal was to quantitatively analyze the bulbar conjunctival microvascular density using optical coherence tomography angiography (OCTA) and compare it to the vessel density using functional slit-lamp biomicroscopy (FSLB).
Zhiping Liu, Hua Wang, Hong Jiang, Giovana Rosa Gameiro, Jianhua Wang   +4 more
doaj   +1 more source

Optical Coherence Tomography Angiography Findings in Primary Open- Angle and Pseudoexfoliation Glaucoma

Türk Oftalmoloji Dergisi, 2022
Objectives:To compare the optical disc and macular vascular density values of patients with glaucoma and healthy individuals by using optical coherence tomography angiography and evaluate the relationship between structural and functional test results ...
Emrah Düzova, Gülizar Demirok, Güner Üney, Ahmet Kaderli, Mehmet Yakın, Selma Özbek-Uzman, Ümit Ekşioğlu   +6 more
doaj   +1 more source

BMPER regulates cardiomyocyte size and vessel density in vivo [PDF]

Cardiovascular Pathology, 2013
BMPER, an orthologue of Drosophila melanogaster Crossveinless-2, is a secreted factor that regulates bone morphogenetic protein activity in endothelial cell precursors and during early cardiomyocyte differentiation. Although previously described in the heart, the role of BMPER in cardiac development and function remain unknown.
Monte S, Willis, Laura A, Dyer, Rongqin, Ren, Pamela, Lockyer, Isabel, Moreno-Miralles, Jonathan C, Schisler, Cam, Patterson   +6 more
openaire   +2 more sources

Retinal vessel density from optical coherence tomography angiography to differentiate early glaucoma, pre-perimetric glaucoma and normal eyes.

PLoS ONE, 2017
PurposeTo evaluate optic nerve vascular density using swept source optical coherence tomography angiography (OCTA) in patients with early primary open angle glaucoma (POAG), pre-perimetric glaucoma and normal eyes.MethodsThis is a prospective ...
Handan Akil, Alex S Huang, Brian A Francis, Sirinivas R Sadda, Vikas Chopra   +4 more
doaj   +1 more source

Optic Disc Vascularization in Glaucoma: Value of Spectral-Domain Optical Coherence Tomography Angiography

Journal of Ophthalmology, 2016
Purpose. To detect changes in optic nerve head (ONH) vascularization in glaucoma patients using spectral-domain OCT angiography (OCT-A). Material and Method.
Pierre-Maxime Lévêque, Pierre Zéboulon, Emmanuelle Brasnu, Christophe Baudouin, Antoine Labbé   +4 more
doaj   +1 more source