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Retinal angiography

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https://www.readbyqxmd.com/read/29677375/characteristics-of-retinal-structural-and-microvascular-alterations-in-early-type-2-diabetic-patients
#1
Qi Chen, Fan Tan, Yufei Wu, Xiran Zhuang, Chaoming Wu, Yuheng Zhou, Yingzi Li, Dan Cheng, Jianhua Wang, Fan Lu, Meixiao Shen
Purpose: To investigate early retinal structural and microvascular changes in patients with type 2 diabetes mellitus (DM) and to analyze relationships among the retinal structure, microvasculature, and choroid. Methods: Seventy-seven patients with type 2 DM (40 with no diabetic retinopathy [DR], 37 with nonproliferative diabetic retinopathy [NPDR]), and 34 control subjects were enrolled. Spectral-domain optical coherence tomography, operating in radial 18-line mode, obtained macular images of the eight intraretinal layers and the choroid...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677368/in-vivo-characterization-of-spontaneous-retinal-neovascularization-in-the-mouse-eye-by-multifunctional-optical-coherence-tomography
#2
Marco Augustin, Matthias Wechdorn, Ulrike Pfeiffenberger, Tanja Himmel, Stanislava Fialová, René M Werkmeister, Christoph K Hitzenberger, Martin Glösmann, Bernhard Baumann
Purpose: To investigate the early development of spontaneous retinal neovascularization in the murine retina by a multifunctional optical coherence tomography approach. To characterize involved tissue changes in vivo and describe structural and functional changes over time. Methods: A multifunctional optical coherence tomography (OCT) system providing 3-fold contrast comprising reflectivity, polarization sensitivity, and OCT angiography (OCTA) was utilized to image very-low-density lipoprotein receptor (VLDLR) knockout mice...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677362/deep-layer-microvasculature-dropout-by-optical-coherence-tomography-angiography-and-microstructure-of-parapapillary-atrophy
#3
Min Hee Suh, Linda M Zangwill, Patricia Isabel C Manalastas, Akram Belghith, Adeleh Yarmohammadi, Tadamichi Akagi, Alberto Diniz-Filho, Luke Saunders, Robert N Weinreb
Purpose: To investigate the association between the microstructure of β-zone parapapillary atrophy (βPPA) and parapapillary deep-layer microvasculature dropout assessed by optical coherence tomography angiography (OCT-A). Methods: Thirty-seven eyes with βPPA devoid of the Bruch's membrane (BM) (γPPA) ranging between completely absent and discontinuous BM were matched by severity of the visual field (VF) damage with 37 eyes with fully intact BM (βPPA+BM) based on the spectral-domain (SD) OCT imaging...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677360/distinctive-analysis-of-macular-superficial-capillaries-and-large-vessels-using-optical-coherence-tomographic-angiography-in-healthy-and-diabetic-eyes
#4
Jianqin Lei, Enhui Yi, Yan Suo, Cheng Chen, Xiayu Xu, Wenxiang Ding, Nizar Saleh Abdelfattah, Xiaojuan Fan, Huiqin Lu
Purpose: To quantify and evaluate macular superficial capillaries and large vessels separately using an optical coherence tomographic angiography (OCTA)-based automatic segmentation algorithm. Methods: In this cross-sectional study, all eyes were scanned using an OCTA device with 3 × 3 mm cube centered on the fovea. Retinal large vessels (arterioles/venules) were automatically segmented from superficial vasculature en-face images. All images were normalized, binarized, and skeletonized for quantification...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29675374/comparison-of-three-fluorescence-labeling-and-tracking-methods-of-endothelial-progenitor-cells-in-laser-injured-retina
#5
Hui Shi, Xin-Rui Wang, Ming-Chao Bi, Wei Yang, Dan Wang, Hai-Le Liu, Ling-Ling Liang, Xiao-Hong Li, Qian Hao, Zhi-Hua Cui, E Song
AIM: To compare three kinds of fluorescent probes for in vitro labeling and in vivo tracking of endothelial progenitor cells (EPCs) in a mouse model of laser-induced retinal injury. METHODS: EPCs were isolated from human umbilical cord blood mononuclear cells and labeled with three different fluorescent probes: 5-(and-6)-carboxyfluorescein diacetate succinimidyl ester (CFSE), 1,1'-dilinoleyl-3,3,3',3'-tetramethylindo-carbocyanine perchlorate linked acetylated low-density lipoprotein (DiI-AcLDL), and green fluorescent protein (GFP)...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29675371/mesenchymal-stem-cells-derived-exosomes-ameliorate-blue-light-stimulation-in-retinal-pigment-epithelium-cells-and-retinal-laser-injury-by-vegf-dependent-mechanism
#6
Guang-Hui He, Wei Zhang, Ying-Xue Ma, Jing Yang, Li Chen, Jian Song, Song Chen
AIM: To observe the effect of exosomes derived from human umbilical cord blood mesenchymal stem cells (hUCMSCs) on the expression of vascular endothelial growth factor-A (VEGF-A) in blue light injured human retinal pigment epithelial (RPE) cells and laser-induced choroidal neovascularization (CNV) in rats. METHODS: Exosomes were isolated from hUCMSCs and characterized by transmission electron microscope and Western blot. MSCs-derived exosomes were cultured with RPE cells exposed to blue light...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29675326/compact-akinetic-swept-source-optical-coherence-tomography-angiography-at-1060-nm-supporting-a-wide-field-of-view-and-adaptive-optics-imaging-modes-of-the-posterior-eye
#7
Matthias Salas, Marco Augustin, Franz Felberer, Andreas Wartak, Marie Laslandes, Laurin Ginner, Michael Niederleithner, Jason Ensher, Michael P Minneman, Rainer A Leitgeb, Wolfgang Drexler, Xavier Levecq, Ursula Schmidt-Erfurth, Michael Pircher
Imaging of the human retina with high resolution is an essential step towards improved diagnosis and treatment control. In this paper, we introduce a compact, clinically user-friendly instrument based on swept source optical coherence tomography (SS-OCT). A key feature of the system is the realization of two different operation modes. The first operation mode is similar to conventional OCT imaging and provides large field of view (FoV) images (up to 45° × 30°) of the human retina and choroid with standard resolution...
April 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29671151/an-atypical-case-of-neurosarcoidosis-presenting-with-neovascular-glaucoma
#8
REVIEW
Melissa Vereecken, Karolien Hollanders, Deborah De Bruyn, Virginie Ninclaus, Julie De Zaeytijd, Ilse De Schryver
BACKGROUND: Sarcoidosis, a multisystem, granulomatous disorder, sometimes manifests with a neuro-ophthalmic subtype. The latter can pose a diagnostic challenge, especially when ocular symptoms appear before systemic involvement, as the clinical picture then can be non-specific and systemic laboratory and standard imaging investigations can be negative. FINDINGS: A 71-year-old woman presented with a 4-month history of sudden-onset visual loss in the left eye. Slit lamp examination revealed anterior chamber cells, iris, and angle neovascularization...
April 18, 2018: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/29667428/optical-coherence-tomography-angiography-characterization-of-acute-and-late-stage-purtscher-retinopathy
#9
Pedro Gil, Miguel Raimundo, João P Marques, João Póvoa, Rufino Silva
PURPOSE: To report a case of Purtscher retinopathy imaged with optical coherence tomography angiography. METHODS: Case-report. Left eye fundoscopic examination in a 21-year old male after a road traffic accident with chest compression revealed multiple peri-papillary cotton-wool spots and intra- and pre-retinal hemorrhages. A diagnosis of Purtscher retinopathy was assumed. RESULTS: In both the superficial and deep retinal plexuses, acute stage optical coherence tomography angiography identified multiple irregular areas of capillary non-perfusion that extended beyond the clinically visible peri-papillary cotton-wool spots...
April 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29664986/optical-coherence-tomography-angiography-and-ultra-widefield-optical-coherence-tomography-in-a-child-with-incontinentia-pigmenti
#10
Sang Jin Kim, Jianlong Yang, Gangjun Liu, David Huang, J Peter Campbell
Incontinentia pigmenti (IP) is a rare X-linked dominant disorder that can cause retinal nonperfusion, neovascularization, and retinal detachment. Evaluation of the peripheral retinal vasculature and appropriate treatment can reduce the risk of blindness. The authors report the use of a handheld prototype optical coherence tomography angiography (OCTA) and ultra-widefield OCT (UWF-OCT) during exam under anesthesia of a 2-year-old with a history of severe early onset IP. UWF-OCT and OCTA may be used as noninvasive imaging modalities for IP and similar retinal vascular disorders in supine young children...
April 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29664983/longitudinal-quantification-of-retinal-nonperfusion-in-the-macula-of-eyes-with-retinal-vein-occlusion-receiving-anti-vegf-therapy-secondary-analysis-of-the-wave-randomized-trial
#11
William C Ou, Shaun I R Lampen, Charles C Wykoff
BACKGROUND AND OBJECTIVE: Longitudinal quantification of retinal nonperfusion (RNP) in eyes with retinal vein occlusion (RVO) undergoing anti-vascular endothelial growth factor therapy. PATIENTS AND METHODS: Thirty eyes with ischemic RVO were randomized to ranibizumab (Lucentis; Genentech, South San Francisco, CA) (monotherapy) or ranibizumab plus peripheral laser (combination therapy) in a 12-month, prospective trial. RNP on fluorescein angiography was quantified within the macula through 12 months of follow-up...
April 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29662112/optical-coherence-tomography-angiography-vessel-density-changes-after-acute-intraocular-pressure-elevation
#12
Qi Zhang, Jost B Jonas, Qian Wang, Szy Yann Chan, Liang Xu, Wen Bin Wei, Ya Xing Wang
To investigate changes in retinal vessel density in optic nerve head (ONH) and macula after acute intraocular pressure (IOP) elevation, we conducted a prospective observational study. Eyes with IOP rise ≥5 mmHg after 2-hour dark room prone provocative test (DRPPT) were included. Vasculature of ONH and macula was examined by optical coherence tomography angiography (OCTA) at baseline and after DRPPT. Among the 65 eyes of 42 individuals, 40 eyes with qualified images were enrolled. Mean IOP rise was 9.6 ± 4...
April 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29660256/quantitative-evaluation-of-oct-angiography-images-of-diabetic-retinopathy-eyes-before-and-after-removal-of-projection-artifacts
#13
Nivedhitha Govindaswamy, Santosh G Gadde, Lavanya Chidambara, Devanshi Bhanushali, Neha Anegondi, Abhijit Sinha Roy
Projection artifacts (PA) affect the quantification of vascular parameters in the deep layer OCT angiography image. This study eliminated PA and quantified its effect on imaging. 53 eyes (30 subjects) of normal Indian subjects and 113 eyes (92 patients) of type 2 diabetes mellitus with retinopathy (DR) underwent imaging with a scan area of 3 mm × 3 mm. In this study, a normalized cross-correlation between superficial and deep layer was used to remove PA in deep layer. Local fractal analysis was done to compute vascular parameters such as foveal avascular zone area (mm2 ), vessel density (%), spacing between large vessels (%) and spacing between small vessels (%)...
April 16, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29656364/characteristic-appearances-of-fundus-autofluorescence-in-treatment-naive-and-active-polypoidal-choroidal-vasculopathy-a-retrospective-study-of-170-patients
#14
Xinyu Zhao, Song Xia, Youxin Chen
PURPOSE: To investigate the characteristic appearances of fundus autofluorescence (FAF) in patients with treatment-naive and active polypoidal choroidal vasculopathy (PCV). METHOD: Cases with the diagnosis of treatment-naive and active PCV from November 2012 to May 2017 at Peking Union Medical College Hospital were retrospectively reviewed. All patients underwent comprehensive ophthalmologic examination. Autofluorescence (AF) findings were described at the retinal sites of the corresponding lesions identified and diagnosed using indocyanine green angiography and spectral-domain optical coherence tomography...
April 14, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29651346/choriocapillaris-loss-in-advanced-age-related-macular-degeneration
#15
REVIEW
Carlos A Moreira-Neto, Eric M Moult, James G Fujimoto, Nadia K Waheed, Daniela Ferrara
The purpose of this review is to summarize the current knowledge on choriocapillaris loss in advanced age macular degeneration (AMD). Several histopathological studies in animal models and human eyes had showed that the choriocapillaris density decreases with age. However, the role of choriocapillaris loss is still unclear in AMD and its advanced forms, either choroidal neovascularization (CNV) or geographic atrophy (GA). Some authors have hypothesized that choriocapillaris loss might precede overt retinal pigment epithelium atrophy...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29651341/the-comparison-of-regional-rnfl-and-fundus-vasculature-by-octa-in-chinese-myopia-population
#16
Yuanjun Li, Hamza Miara, Pingbo Ouyang, Bing Jiang
Purpose: To determine the correlations between peripapillary vessel density, retinal nerve fibre layer (RNFL) thickness, and myopic indices at retina quadrants with optical coherence tomography angiography (OCTA) in Chinese. Methods: Fifty-six subjects with a mean spherical equivalent (MSE) of -3.63 ± 0.29 D were included. Peripapillary RNFL thickness and retinal vessel density in four sectors (superior, nasal, inferior, and temporal quadrants) were determined by OCTA, and correlations of the main outcomes were analyzed...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29651340/changes-in-flow-density-measured-using-optical-coherence-tomography-angiography-after-istent-insertion-in-combination-with-phacoemulsification-in-patients-with-open-angle-glaucoma
#17
Maged Alnawaiseh, Viktoria Müller, Larissa Lahme, Ralph Laurent Merté, Nicole Eter
Purpose: To evaluate changes in flow density after the implantation of a trabecular microbypass stent (iStent) in combination with cataract surgery. Methods: A total of 48 eyes of 48 patients, who underwent either cataract surgery alone (cataract group) or cataract surgery with implantation of two iStent inject devices (iStent group), were prospectively included in this study. Intraocular pressure (IOP) and flow density data before and after surgery were extracted and analyzed...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29649987/multimodal-imaging-of-foveoschisis-and-macular-pseudohole-associated-with-gyrate-atrophy-a-family-report
#18
Imène Zhioua Braham, Imen Ammous, Rim Maalej, Majdi Boukari, Ilhem Mili Boussen, Khalil Errais, Raja Zhioua
BACKGROUND: To report the results of multimodal imaging of a biochemically confirmed case of a family with gyrate atrophy (GA) associated with foveoschisis and macular pseudohole. CASE PRESENTATION: Two sisters presented to us with progressive bilateral decreased vision. The 26-year old sister had a best corrected visual acuity (BCVA) of 20/32 in the right eye (RE) and 20/100 in the left eye (LE). Dilated fundus examination revealed multiple bilateral chorioretinal atrophy areas in the midperipheral and peripheral retina...
April 12, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29643788/polypoidal-choroidal-vasculopathy-associated-with-optic-disc-coloboma
#19
Yumiko Nakano, Akiko Miki, Shigeru Honda, Makoto Nakamura
Purpose: To report a case of polypoidal choroidal vasculopathy associated with optic disc coloboma. Methods: Case report. Results: A 50-year-old woman presented with optic disc coloboma and retinochoroidal coloboma associated with subretinal hemorrhage and serous retinal detachment (SRD) in her left eye. Optical coherence tomography (OCT) confirmed SRD at the macula and showed a sharply elevated retinal epithelial detachment at the choroidal excavation...
January 2018: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29643787/optical-coherence-tomography-angiography-of-foveal-neovascularization-in-diabetic-retinopathy
#20
Konstantinos Andreanos, Tryfon Rotsos, George Kymionis, Chryssanthi Koutsandrea, Athanasios Kotsolis, Ioannis Ladas
Purpose: To report a case of foveal neovascularization in a patient with proliferative diabetic retinopathy as seen on optical coherence tomography angiography (OCT-A). Methods: Multimodal imaging was used for diagnostic investigation. Patient: A 61-year-old male with a 16-year history of insulin-dependent diabetes mellitus was referred to our medical retina department for examination and management. Meticulous fundus examination and multimodal imaging revealed proliferative diabetic retinopathy lesions, including neovascularization located in the foveal area...
January 2018: Case Reports in Ophthalmology
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