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Retinal angiography

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https://www.readbyqxmd.com/read/28447287/topography-and-correlation-of-radial-peripapillary-capillary-density-network-with-retinal-nerve-fibre-layer-thickness
#1
Tarannum Mansoori, Jayanthi Sivaswamy, Jahnavi Sai Gamalapati, Nagalla Balakrishna
PURPOSE: To analyse the expansion of radial peripapillary capillary (RPC) network with optical coherence tomography angiography (OCT-A) in normal human eyes and correlate RPC density with retinal nerve fibre layer thickness (RNFLT) at various distances from the optic nerve head (ONH) edge. METHODS: Fifty eyes of 50 healthy subjects underwent imaging with RTVue XR-100 Avanti OCT. OCT-A scans of Angio disc (6 × 6 mm) and Angio retina (8 × 8 mm) were combined to create a wide-field montage image of the RPC network...
April 26, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28445869/silicone-oil-related-visual-loss
#2
Hamouda Hamdy Ghoraba, Adel Galal Zaky, Mohamed Amin Heikal, Emad Eldin Mohamed Elgemai, Haithem Mamoun Abd Al Fatah
BACKGROUND: Silicone oil (SO) is used as an intravitreal tamponade agent in vitreoretinal surgery for rhegmatogenous retinal detachment (RRD) complicated by proliferative vitreoretinopathy or with large, multiple retinal tears. Usually, SO is left in the eye for at least 3 months. Although its use can lead to well-known complications, intraocular SO is generally well tolerated. Some studies have reported unexpected central vision loss after SO use or removal. OBJECTIVE: To investigate and analyze the reason for visual loss after the use or removal of intraocular SO in patients who underwent vitrectomy surgeries for RRD...
April 27, 2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28440254/combined-branch-retinal-vein-and-branch-retinal-artery-occlusion-clinical-features-systemic-associations-and-outcomes
#3
Sabyasachi Sengupta, Utsab Pan
PURPOSE: Retinal vascular occlusions affecting both the arterial and venous systems are rare events. Combined branch retinal artery (BRAO) and vein (BRVO) occlusion are exceedingly rare and not well characterized. METHODS: Six patients with combined BRAO and BRVO underwent a comprehensive eye examination, fundus fluorescein angiography, optical coherence tomography, and cardiovascular evaluation. RESULTS: Mean age at presentation was 54 ± 7...
March 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28438153/damage-to-the-macula-associated-with-led-derived-blue-laser-exposure-a-case-report
#4
Lingling Liang, Zhihua Cui, Chengwei Lu, Qian Hao, Yajuan Zheng
BACKGROUND: Light emitting diodes laser is emerging as an important source of light replacing conventional lights. It is widely used for illumination in the bar where young people love to go. But not everyone knows about the light damage to the eye especially to the macula. In this article, we report the case of a macular damage induced by LED-derived blue laser in a bar, studied with optical coherence tomography (OCT) to evaluate the retinal lesion and multifocal electroretinography (mfERG) to evaluate functional damage...
April 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28437483/quantitative-microvascular-analysis-of-retinal-venous-occlusions-by-spectral-domain-optical-coherence-tomography-angiography
#5
Nicole Koulisis, Alice Y Kim, Zhongdi Chu, Anoush Shahidzadeh, Bruce Burkemper, Lisa C Olmos de Koo, Andrew A Moshfeghi, Hossein Ameri, Carmen A Puliafito, Veronica L Isozaki, Ruikang K Wang, Amir H Kashani
PURPOSE: To quantitatively evaluate the retinal microvasculature in human subjects with retinal venous occlusions (RVO) using optical coherence tomography angiography (OCTA). DESIGN: Retrospective, cross-sectional, observational case series. PARTICIPANTS: Sixty subjects (84 eyes) were included (20 BRVO, 14 CRVO, 24 unaffected fellow eyes, and 26 controls). METHODS: OCTA was performed on a prototype, spectral domain-OCTA system in the 3x3mm central macular region...
2017: PloS One
https://www.readbyqxmd.com/read/28433123/optical-coherence-tomography-angiography-of-a-central-retinal-artery-occlusion-before-and-after-anterior-chamber-paracentesis
#6
Christopher K Hwang, Anton M Kolomeyer, Alexander J Brucker
No abstract text is available yet for this article.
May 2017: Ophthalmology
https://www.readbyqxmd.com/read/28432113/automated-quantitative-characterisation-of-retinal-vascular-leakage-and-microaneurysms-in-ultra-widefield-fluorescein-angiography
#7
Justis P Ehlers, Kevin Wang, Amit Vasanji, Ming Hu, Sunil K Srivastava
Ultra-widefield fluorescein angiography (UWFA) is an emerging imaging modality used to characterise pathology in the retinal vasculature such as microaneurysms (MAs) and vascular leakage. Despite its potential value for diagnosis and disease surveillance, objective quantitative assessment of retinal pathology by UWFA is currently limited because it requires laborious manual segmentation by trained human graders. In this report, we describe a novel fully automated software platform, which segments MAs and leakage areas in native and dewarped UWFA images with retinal vascular disease...
April 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28432111/regional-vascular-density-visual-field-sensitivity-relationship-in-glaucoma-according-to-disease-severity
#8
Joong Won Shin, Jiyun Lee, Junki Kwon, Jaewan Choi, Michael S Kook
AIMS: To study whether there are global and regional relationships between peripapillary vascular density (pVD) assessed by optical coherence tomography angiography (OCT-A) and visual field (VF) mean sensitivity at different glaucoma stages. METHODS: Microvascular images and peripapillary retinal nerve fibre layer (pRNFL) thicknesses were obtained using a Cirrus OCT-A device in 91 glaucoma subjects. The pVD was measured at various spatial locations according to the Garway-Heath map, using a MATLAB software (The MathWorks, Natick, Massachusetts)...
April 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28429123/optical-coherence-tomography-angiography-vessel-density-mapping-at-various-retinal-layers-in-healthy-and-normal-tension-glaucoma-eyes
#9
Joong Won Shin, Kyung Rim Sung, Ji Yun Lee, Junki Kwon, Mincheol Seong
PURPOSE: To investigate peripapillary vessel density at various spatial locations and layers in healthy and normal tension glaucoma eyes using optical coherence tomography angiography (OCTA). METHODS: A commercial OCTA device (AngioPlex; Carl Zeiss Meditec) was used to image microvasculature in a 6 × 6-mm optic disc region. Vessel densities of superficial and deep retinal layers were calculated using an automatic thresholding algorithm. Vessel density maps were plotted by averaging individual angiogram images...
April 20, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28427064/emerging-issues-for-ultra-wide-field-angiography
#10
Alessandro Rabiolo, Luigi Antonio De Vitis, Riccardo Sacconi, Adriano Carnevali, Lea Querques, Francesco Bandello, Giuseppe Querques
Fluorescein angiography (FA) is a useful test in patients affected by diabetic retinopathy (DR) to evaluate the blood-retinal barrier integrity and the presence of non-perfused areas, vascular leakage, microvascular abnormalities, and neovascularization. The peripheral retina is involved in most DR lesions, and, thus, its proper visualization is crucial for the screening, diagnosis, monitoring, treatment, and prognosis of DR. To expand the field of view, wide-field and ultra-wide-field imaging have been developed, allowing images up to 200° of retinal surface in one single photo...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28427063/optical-coherence-tomography-angiography-in-diabetic-maculopathy
#11
Gabriel Coscas, Marco Lupidi, Florence Coscas
Fluorescein angiography (FA) and indocyanine green angiography have provided information about the normal retinal and choroidal anatomy, nearly comparable to histological findings. These tests have been fundamental in the evaluation of all retinal and choroidal vascular diseases and have allowed clinicians to define and diagnose several pathological conditions. FA became the "gold standard" in retinal imaging due to the capacity to visualize the retinal capillary bed and its changes, both in the macular area and in the periphery...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28427062/emerging-issues-for-optical-coherence-tomography
#12
Luisa Pierro, Alessandro Rabiolo
Almost 25 years after its introduction, optical coherence tomography (OCT) is still a crucial test in the evaluation of patients affected by diabetic retinopathy. In this chapter, the authors provide an extensive overview of the posterior segment pathological changes induced by diabetes, characterized using OCT. OCT plays a key role in diabetic macular edema (DME) as it assesses related retinal changes both in a qualitative (i.e., DME pattern, presence and aspects of cysts, fluid localization, integrity, and reflectivity of retinal layers) and quantitative (i...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28426631/directional-changes-in-tissue-reflectivity-may-influence-flow-detection-on-optical-coherence-tomography-angiography
#13
Rosa Dolz-Marco, K Bailey Freund
PURPOSE: To determine if directional or anatomical changes in tissue reflectivity of Henle fiber layer (HFL) may influence flow detection on optical coherence tomography angiography (OCT-A). METHODS: Cross-sectional analysis of consecutive cases undergoing OCT-A. Directional changes in visualization of HFL were either produced manually by moving the beam entrance within the pupil or observed occurring naturally because of tilting of the OCT line-scan within a myopic staphyloma...
April 19, 2017: Retina
https://www.readbyqxmd.com/read/28423387/optical-coherence-tomography-angiography-of-retinal-cavernous-hemangioma
#14
Ananda Kalevar, Kevin H Patel, H Richard McDonald
No abstract text is available yet for this article.
May 2017: Retina
https://www.readbyqxmd.com/read/28421342/selective-retina-therapy-with-automatic-real-time-feedback-controlled-dosimetry-for-chronic-central-serous-chorioretinopathy-in-korean-patients
#15
Young Gun Park, Seungbum Kang, Minhee Kim, Nari Yoo, Young Jung Roh
PURPOSE: To evaluate the safety and efficacy of selective retina therapy (SRT) with real-time feedback-controlled dosimetry (RFD) in the treatment of chronic central serous chorioretinopathy (CSC). METHODS: In this retrospective case series study, 50 eyes of 49 patients with chronic CSC demonstrating focal or diffuse foveal leakages on fundus fluorescein angiography (FFA) were included. Following evaluation of test spots at temporal arcades, SRT (wavelength 527 nm, pulse repetition rate 100 Hz, pulse energy ramp with maximal 15 pulses) with retinal spot diameter of 200 μm was applied to the areas of each leakage observed on fluorescein angiography...
April 18, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28419405/optical-coherence-tomography-angiography-features-in-melanocytoma-of-the-optic-nerve
#16
Adriano Carnevali, Lea Querques, Ilaria Zucchiatti, Vincenzo Scorcia, Francesco Bandello, Giuseppe Querques
Optic disc melanocytoma (ODM) is a pigmented tumor with malignant potential characterized clinically as a dark brown to black lesion with feathery margins. The authors report a case of ODM and describe the utility of optical coherence tomography angiography (OCTA) in detecting superficial tumor vascularization. This case report demonstrated the ability of OCTA to reveal the fine abnormal retinal vasculature on the surface of the lesion, a characteristic of ODM, which has been previously correlated with tumor growth...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28419395/choriocapillaris-changes-imaged-by-oct-angiography-after-half-dose-photodynamic-therapy-for-chronic-central-serous-chorioretinopathy
#17
Kyoko Fujita, Akiyuki Kawamura, Mitsuko Yuzawa
BACKGROUND AND OBJECTIVE: To evaluate the choriocapillaris using optical coherence tomographic angiography (OCTA) after half-dose verteporfin photodynamic therapy (hd-PDT) for chronic central serous chorioretinopathy (CSC). PATIENTS AND METHODS: We studied six eyes (six patients) with chronic CSC treated by hd-PDT. OCTA was performed before, 1 week after, and 1 month after hd-PDT. The area of flow abnormality at the choriocapillaris level within the PDT spot after hd-PDT was compared with that before hd-PDT...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28413837/familial-exudative-vitreoretinopathy-presentation-as-persistent-fetal-vasculature
#18
Jeffrey Z Kartchner, M Elizabeth Hartnett
PURPOSE: To illustrate a presentation of familial exudative vitreoretinopathy (FEVR) that can be mistaken for unilateral persistent fetal vasculature (PFV) and the importance of wide angle fluorescein angiography in making this distinction. A patient was referred with a unilateral retrolental membrane and retinal detachment from PFV but was found to have FEVR. OBSERVATIONS: A 4 month-old full-term infant was referred with the diagnosis of PFV based on findings of a dense retrolental membrane and microphthalmia in the left eye...
June 2017: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/28413403/two-cases-of-proliferative-diabetic-retinopathy-with-marked-sheathing-of-the-retinal-arteries-following-vitrectomy
#19
Yuko Nishikawa, Seita Morishita, Kimitoshi Nakamura, Masanori Fukumoto, Hiroyuki Suzuki, Kensuke Tajiri, Takaki Sato, Takatoshi Kobayashi, Teruyo Kida, Hidehiro Oku, Tsunehiko Ikeda
PURPOSE: The aim of this paper was to report 2 patients (3 eyes) with proliferative diabetic retinopathy (PDR) who showed marked sheathing of the retinal arterioles that was ultimately attributed to calcification following vitrectomy. CASES: Case 1 involved a 65-year-old female with PDR who underwent bilateral vitrectomy for traction retinal detachment. Postoperatively, bilateral retinal redetachment (reRD) was observed. Sheathing of the retinal arterioles was observed at the same time, yet was not apparent preoperatively...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28406171/optical-coherence-tomography-angiography-to-estimate-retinal-blood-flow-in-eyes-with-retinitis-pigmentosa
#20
Masako Sugahara, Manabu Miyata, Kenji Ishihara, Norimoto Gotoh, Satoshi Morooka, Ken Ogino, Tomoko Hasegawa, Takako Hirashima, Munemitsu Yoshikawa, Masayuki Hata, Yuki Muraoka, Sotaro Ooto, Kenji Yamashiro, Nagahisa Yoshimura
Ophthalmologists sometimes face difficulties in identifying the origin of visual acuity (VA) loss in a retinitis pigmentosa (RP) patient, particularly before cataract surgery: cataract or the retinal disease state. Therefore, it is important to identify the significant factors correlating with VA. Nowadays, retinal blood flow in superficial and deep layers can be estimated non-invasively using optical coherence tomography angiography (OCTA). We estimated blood flow per retinal layer by using OCTA; investigated the correlation between VA and other parameters including blood flow and retinal thickness; and identified the most associated factor with VA in patients with RP...
April 13, 2017: Scientific Reports
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