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OCT angiography

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https://www.readbyqxmd.com/read/28433988/comparison-of-choriocapillaris-flow-measurements-between-two-optical-coherence-tomography-angiography-devices
#1
Jost L Lauermann, Peter Heiduschka, Pieter Nelis, Maximilian Treder, Maged Alnawaiseh, Christoph R Clemens, Nicole Eter, Florian Alten
PURPOSE: To evaluate choriocapillaris (CC) perfusion in healthy subjects using 2 different optical coherence tomography angiography (OCT-A) devices. PROCEDURES: Macular OCT-A imaging (36 eyes of 36 subjects) was performed using Optovue AngioVue and Zeiss AngioPlex devices. CC decorrelation signal index was assessed, and CC data were analyzed regarding intra-device variability, inter-device correlation, age, signal strength, and fields of view. RESULTS: The intra-device variability of CC measurements in the 3 × 3 mm2 field was 5...
April 22, 2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28432111/regional-vascular-density-visual-field-sensitivity-relationship-in-glaucoma-according-to-disease-severity
#2
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/28427063/optical-coherence-tomography-angiography-in-diabetic-maculopathy
#3
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
#4
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
#5
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/28423237/assessment-of-vascular-response-to-bioss-lim-c-%C3%A2-stents-vs-orsiro-%C3%A2-stents-in-the-porcine-coronary-artery-model
#6
Jacek Bil, Robert J Gil, Tomasz Pawlowski, Krzysztof P Milewski
AIMS: The optimal treatment strategy for coronary bifurcation lesions is still unknown. The aim of the study was to assess applicability of the new cobalt-chromium version of the sirolimus-eluting dedicated bifurcation BiOSS(®) LIM C stent in comparison with regular sirolimus-eluting Orsiro(®)  stent in a porcine coronary model. METHODS: A total of 13 BiOSS(®) LIM C stents and 6 Orsiro(®) stents were implanted in normal non-atherosclerotic porcine straight coronary arteries of six animals using 1...
April 19, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28419694/quantitative-depth-resolved-microcirculation-imaging-with-optical-coherence-tomography-angiography-part-%C3%AE-%C3%AE-microvascular-network-imaging
#7
Wanrong Gao
In this work, we review the main phenomena that have been explored in OCT angiography to image the vessels of the microcirculation within living tissues with the emphasis on how the different processing algorithms were derived to circumvent specific limitations. Parameters are then discussed that can quantitatively describe the depth-resolved microvascular network for possible clinic diagnosis applications. Finally,future directions in continuing OCT development are discussed. This article is protected by copyright...
April 17, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28419622/quantitative-depth-resolved-microcirculation-imaging-with-optical-coherence-tomography-angiography-part-%C3%AE-blood-flow-velocity-imaging
#8
Wanrong Gao
The research goal of the microvascular network imaging with optical coherence tomography (OCT) angiography is to achieve depth resolved blood flow and vessel imaging in vivo in the clinical management of patents. In this review, we review the main phenomena that have been explored in OCT to image the blood flow velocity vector and the vessels of the microcirculation within living tissues. Parameters that limit the accurate measurements of blood flow velocity are then condisered. Finally, initial Clinic diagnosis applications of and future developments are discussed...
April 17, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28419395/choriocapillaris-changes-imaged-by-oct-angiography-after-half-dose-photodynamic-therapy-for-chronic-central-serous-chorioretinopathy
#9
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/28413409/self-optical-coherence-tomography-and-angiography
#10
Ahmad M Mansour
PURPOSE: To present a new concept of self-optical coherence tomography (OCT) and self-OCT angiography. METHODS: The operator sits in the patient seat and manipulates the instrument body via the joystick with the dominant hand, while the dominant index is ready to press the capture button and while focusing on the fixation target. One senior ophthalmologist judged various OCT machines for ease of self-scan during a major ophthalmic convention. Separately, self-scans were also captured using a single OCT machine by one senior ophthalmologist and 5 junior optometrists and the scans were analyzed for both centration and image quality value (IQV), and compared to regular scans done by an operator...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28413408/choroidal-nevus-associated-neovascular-membrane-demonstrated-by-oct-angiography
#11
Joel Hanhart, Kobi Brosh, Yishay Weill, Yaakov Rozenman
We present a case of choroidal nevus, complicated by a choroidal neovascular membrane (CNV) that was detected by OCT angiography. Choroidal nevi are relatively common intraocular tumors. The presence of subretinal and intraretinal fluids can indicate that a CNV has occurred as a complication, warranting prompt management. However, subretinal and intraretinal fluids are also documented in nevi without CNV. OCT angiography may be of great help in determining whether those fluids are associated or not with a CNV, therefore guiding therapy...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28413403/two-cases-of-proliferative-diabetic-retinopathy-with-marked-sheathing-of-the-retinal-arteries-following-vitrectomy
#12
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/28405759/-statement-of-the-professional-association-of-german-ophthalmologists-bva-the-german-ophthalmological-society-dog-and-the-german-retina-society-rg-oct-angiography-in-germany-presentation-nomenclature-and-future-plans-situation-january-2017
#13
(no author information available yet)
No abstract text is available yet for this article.
April 12, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28404670/intravitreal-dexamethasone-implant-in-radiation-induced-macular-oedema
#14
Luisa Frizziero, Raffaele Parrozzani, Sara Trainiti, Elisabetta Pilotto, Giacomo Miglionico, Serena Pulze, Edoardo Midena
AIMS: To evaluate the efficacy and duration of activity of a single intravitreal dexamethasone implant in patients affected by radiation maculopathy. METHODS: Thirteen consecutive eyes of 13 patients affected by radiation maculopathy secondary to eye irradiation for a primary uveal melanoma (Iodine-125 brachytherapy) and treated with a single intravitreal 0.7 mg dexamethasone implant were retrospectively evaluated. Each patient underwent full ophthalmological examination, including fluorescein angiography and spectral domain optical coherence tomography (SD-OCT), even in en-face modality...
April 12, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28403072/retinal-microvascular-alterations-related-to-diabetes-assessed-by-optical-coherence-tomography-angiography-a-cross-sectional-analysis
#15
Julien Gozlan, Pierre Ingrand, Olivier Lichtwitz, Agathe Cazet-Supervielle, Léa Benoudis, Michele Boissonnot, Samy Hadjadj, Nicolas Leveziel
Fluorescein angiography has been so far the gold-standard test to assess diabetic macular ischemia (DMI), a cause of irreversible visual impairment in diabetic patients. The aim of this study was to investigate foveal avascular zone (FAZ) and perifoveal microcirculation changes in eyes with nonproliferative diabetic retinopathy (NPDR) using optical coherence tomography angiography (OCTA), a new and noninvasive vascular imaging technique.Cross-sectional study including eyes of diabetic patients with NPDR.All patients underwent medical history, best-corrected visual acuity (BCVA) measurement, slit-lamp and fundus examination, multicolor imaging, SD-OCT, and swept-source OCT...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28401030/macular-ischemia-after-intravitreal-amikacin-on-patient-with-intraocular-foreign-body
#16
Arief Kartasasmita, Susi Mona, Erwin Iskandar, Iwan Sovani, Djonggi Panggabean
Background: Although still used in third world countries, amikacin has a harmful effect to be used intravitreally. Purpose: To report macular ischemia after an intravitreal injection of amikacin Methods: A case report regarding a traumatized eye of a 26-year-old man that was injected intravitreally with amikacin due to intraocular foreign body endophthalmitis Results: Angiography and OCT show macular ischemia due to amikacin toxicity. Conclusion: The case reported here is to alert about the potential harmful effect of intravitreally injected amikacin despite its role as an accepted regimen for endohthalmitis cases...
2017: GMS Ophthalmology Cases
https://www.readbyqxmd.com/read/28401029/iatrogenic-central-retinal-artery-occlusion-after-carotid-body-tumor-embolization-and-excision
#17
Carlos M Rangel, Sergio Jaramillo, Clara L Varón, Angélica M Prada
Objective: To report a case of iatrogenic central retinal artery occlusion after embolization and surgical resection of carotid body paraganglioma. Methods: Case report Results: One adult female patient presented with persistent unilateral visual loss after embolization with Embosphere(®) and Contour(®) microparticles of carotid body tumor. Fluorescein angiography revealed intraluminal microspheres in the central retinal artery ramifications. OCT revealed intraretinal spherical, hyporeflective particles with posterior shadowing...
2017: GMS Ophthalmology Cases
https://www.readbyqxmd.com/read/28395906/-oct-angiography-and-choroidal-ischemia-related-to-arteritic-anterior-ischemic-optic-neuropathy
#18
M-B Rougier, M-N Delyfer, J-F Korobelnik
No abstract text is available yet for this article.
April 7, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28391446/a-review-of-current-and-future-management-of-geographic-atrophy
#19
REVIEW
Riccardo Sacconi, Eleonora Corbelli, Lea Querques, Francesco Bandello, Giuseppe Querques
Age-related macular degeneration (AMD) is a multifactorial disease and a leading cause of vision impairment in elderly people in Western society. Geographic atrophy (GA), the late stage of dry AMD, is typically defined as a round or oval area of atrophy of 175 µm or more. In GA patients, visual acuity (VA) can still be good if the macula is spared, but decreased if GA extends through the fovea causing a great impairment of quality of life. Because of a poor correlation between VA and GA lesions or progression, a multimodal imaging approach is necessary to better follow up GA patients...
April 8, 2017: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/28388703/quantitative-oct-angiography-of-the-retinal-microvasculature-and-the-choriocapillaris-in-myopic-eyes
#20
Mayss Al-Sheikh, Nopasak Phasukkijwatana, Rosa Dolz-Marco, Mansour Rahimi, Nicholas A Iafe, K Bailey Freund, SriniVas R Sadda, David Sarraf
Purpose: To study the retinal capillary microvasculature and the choriocapillaris (CC) in myopic eyes using quantitative optical coherence tomography angiography (OCTA) analysis. Methods: Macular OCTA images of 3 × 3 mm were obtained using the RTVue-XR Avanti with AngioVue. Quantitative measurements of the retinal capillary microvascular layers and the CC were analyzed using en face projection images. Vessel density and fractal dimension of the superficial and deep retinal capillary plexus, and area and density of flow reduction in the CC were analyzed, quantified, and compared with an age-matched control group...
April 1, 2017: Investigative Ophthalmology & Visual Science
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