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https://www.readbyqxmd.com/read/29140817/new-developments-in-optical-coherence-tomography-imaging-for-glaucoma
#1
Jean-Claude Mwanza, Donald L Budenz
PURPOSE OF REVIEW: Since its introduction in ophthalmology, optical coherence tomography (OCT) has undergone significant advances in imaging protocols, algorithms, and addition of new parameters which have maximized its potential for diagnosing, evaluating the response to treatment, and assessing the progression of various ocular diseases, including glaucoma. This review provides an update on recent developments in OCT with respect to the management of glaucoma. RECENT FINDINGS: Most recent notable developments include the introduction of the minimum distance band, which is a three-dimensional optic nerve head parameter, and Swept-Source OCT with its single wide-field scanning capability...
November 14, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/29140815/neuroimaging-diagnostic-and-monitoring-approaches-in-ophthalmology
#2
Bart K Chwalisz, Marc A Bouffard, Sashank Prasad, Dean M Cestari
PURPOSE OF REVIEW: We review new applications of optical coherence tomography (OCT) technology in neuro-ophthalmology. We also describe new technologies for visualizing the extracranial vessels in the diagnosis of giant cell arteritis (GCA). RECENT FINDINGS: Newer OCT modalities are expanding the evaluation of the optic disc, and are being applied to a number of neurologic conditions such as demyelinating and neurodegenerative disease. Swept-source OCT and enhanced-depth imaging OCT are refining the fine-grained analysis of the optic nerve head in the diagnosis of papilledema and optic nerve drusen...
November 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29140735/factors-associated-with-visual-acuity-in-patients-with-cystoid-macular-oedema-and-retinitis-pigmentosa
#3
Gerald Liew, Anthony T Moore, Patrick D Bradley, Andrew R Webster, Michel Michaelides
PURPOSE: Retinitis pigmentosa is the most common inherited retinal dystrophy. The factors associated with visual acuity in patients with other retinal diseases are well known, but are poorly understood in patients with retinitis pigmentosa. This knowledge is useful for prognosis and to support secondary endpoints in clinical trials. METHODS: We conducted a cross-sectional study of consecutive patients recruited from the inherited retinal disease service from January 2012 to December 2012...
November 15, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29140506/quantification-of-the-effect-of-toxicants-on-the-intracellular-kinetic-energy-and-cross-sectional-area-of-mammary-epithelial-organoids-by-oct-fluctuation-spectroscopy
#4
Xiao Yu, Ashley M Fuller, Richard Blackmon, Melissa A Troester, Amy L Oldenburg
The ability to assess toxicant exposures of three-dimensional (3D) in vitro mammary models that recapitulate the tissue microenvironment can aid in our understanding of environmental exposure risk over time. Longitudinal studies of 3D model systems, however, are cumbersome and suffer from a lack of high-throughput toxicological assays. In this study, we establish a noninvasive and label-free optical coherence tomography (OCT)-based imaging platform for tracking exposure-response relationships in 3D human mammary epithelial organoid models...
November 10, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29140358/q-switch-pumped-supercontinuum-for-ultra-high-resolution-optical-coherence-tomography
#5
Michael Maria, Ivan Bravo Gonzalo, Thomas Feuchter, Mark Denninger, Peter M Moselund, Lasse Leick, Ole Bang, Adrian Podoleanu
In this Letter, we investigate the possibility of using a commercially available Q-switch-pumped supercontinuum (QS-SC) source, operating in the kilohertz regime, for ultra-high resolution optical coherence tomography (UHR-OCT) in the 1300 nm region. The QS-SC source proves to be more intrinsically stable from pulse to pulse than a mode-locked-based SC (ML-SC) source while, at the same time, is less expensive. However, its pumping rate is lower than that used in ML-SC sources. Therefore, we investigate here specific conditions to make such a source usable for OCT...
November 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/29139045/electroretinography-in-idiopathic-intracranial-hypertension-comparison-of-the-pattern-erg-and-the-photopic-negative-response
#6
Jason C Park, Heather E Moss, J Jason McAnany
PURPOSE: To evaluate the relationship between electrophysiological measures of retinal ganglion cell (RGC) function in patients who have idiopathic intracranial hypertension (IIH). METHODS: The pattern electroretinogram (pERG) and photopic negative response (PhNR) were recorded from 11 IIH patients and 11 age-similar controls. The pERG was elicited by a contrast-reversing checkerboard. The PhNR, a slow negative component following the flash ERG b-wave, was recorded in response to a long-wavelength flash presented against a short-wavelength adapting field...
November 14, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/29138978/-morphology-of-the-vitreoretinal-interface-in-fellow-eyes-of-patients-with-full-thickness-macular-holes
#7
J E Klaas, S Burzer, S Abraham, N Feucht, C P Lohmann, M Maier
PURPOSE: We performed a retrospective, observational clinical study to evaluate the vitreoretinal interface (VRI) in fellow eyes of patients with full thickness macular holes (FTMH) based on spectral domain optical coherence tomography (SD-OCT) examinations. METHODS: The VRI in fellow eyes of 38 patients with idiopathic FTMH, 6 of which had concomitant vitreomacular traction (VMT) and the VRI of 32 patients with FTMH with complete resolution of VMT were examined by SD-OCT for the presence of vitreomacular adhesion (VMA), VMT and the formation of FTMH, lamellar macular holes (LMH), macular pseudoholes (MPH) or epiretinal membranes (ERM)...
November 14, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29138543/location-of-submacular-hemorrhage-as-a-predictor-of-visual-outcome-after-intravitreal-ranibizumab-for-age-related-macular-degeneration
#8
Dimitrios Karagiannis, Irini Chatziralli, Konstantinos Kaprinis, Ilias Georgalas, Efstratios Parikakis, Panagiotis Mitropoulos
Purpose: To evaluate the anatomical and functional outcomes in patients with submacular hemorrhage (SMH) due to age-related macular degeneration (AMD) treated with ranibizumab, and to evaluate the potential role of the SMH location in the final outcome after treatment. Methods: Participants in this study were 12 treatment-naïve patients with SMH due to neovascular AMD who were treated with intravitreal ranibizumab and had at least 12 months' follow-up. All patients underwent best-corrected visual acuity measurement and optical coherence tomography at baseline and at every visit posttreatment, while fluorescein angiography was done at baseline and at the discretion of the physician thereafter...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29138527/longitudinal-analysis-of-mouse-sdoct-volumes
#9
Bhavna J Antony, Aaron Carass, Andrew Lang, Byung-Jin Kim, Donald J Zack, Jerry L Prince
Spectral-domain optical coherence tomography (SDOCT), in addition to its routine clinical use in the diagnosis of ocular diseases, has begun to find increasing use in animal studies. Animal models are frequently used to study disease mechanisms as well as to test drug efficacy. In particular, SDOCT provides the ability to study animals longitudinally and non-invasively over long periods of time. However, the lack of anatomical landmarks makes the longitudinal scan acquisition prone to inconsistencies in orientation...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29138449/haemodynamic-recovery-properties-of-the-torsioned-testicular-artery-lumen
#10
Selda Goktas, Ozlem Yalcin, Erhan Ermek, Senol Piskin, Can T Capraz, Yusuf O Cakmak, Kerem Pekkan
Testicular artery torsion (twisting) is one such severe vascular condition that leads spermatic cord injury. In this study, we investigate the recovery response of a torsioned ram testicular artery in an isolated organ-culture flow loop with clinically relevant twisting modes (90°, 180°, 270° and 360° angles). Quantitative optical coherence tomography technique was employed to track changes in the lumen diameter, wall thickness and the three-dimensional shape of the vessel in the physiological pressure range (10-50 mmHg)...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29138314/imaging-and-quantifying-ganglion-cells-and-other-transparent-neurons-in-the-living-human-retina
#11
Zhuolin Liu, Kazuhiro Kurokawa, Furu Zhang, John J Lee, Donald T Miller
Ganglion cells (GCs) are fundamental to retinal neural circuitry, processing photoreceptor signals for transmission to the brain via their axons. However, much remains unknown about their role in vision and their vulnerability to disease leading to blindness. A major bottleneck has been our inability to observe GCs and their degeneration in the living human eye. Despite two decades of development of optical technologies to image cells in the living human retina, GCs remain elusive due to their high optical translucency...
November 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29137819/vascular-response-and-healing-profile-of-everolimus-eluting-bioresorbable-vascular-scaffolds-for-percutaneous-treatment-of-chronic-total-coronary-occlusions-a-one-year-optical-coherence-tomography-analysis-from-the-ghost-cto-registry
#12
Alessio La Manna, Eligio Miccichè, Guido D'Agosta, Gabriel Tensol Rodrigues Pereira, Guilherme Ferragut Attizzani, Piera Capranzano, Davide Capodanno, Corrado Tamburino
BACKGROUND: Bioresorbable vascular scaffolds (BVS) have been heralded with potential benefits that are especially desired in long lesions, including chronic total occlusions (CTOs). Procedural feasibility and mid-term outcomes of BVS in CTOs have been reported. However, there is still a paucity of data regarding the vascular and healing response to BVS in CTOs evaluated by optical coherence tomography (OCT). METHODS: This study included prospectively 21 patients who had a CTO lesion treated with a BVS...
November 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29137322/the-c-jun-n-terminal-kinase-plays-a-key-role-in-ocular-degenerative-changes-in-a-mouse-model-of-alzheimer-disease-suggesting-a-correlation-between-ocular-and-brain-pathologies
#13
Lucia Buccarello, Alessandra Sclip, Matteo Sacchi, Anna Maria Castaldo, Ilaria Bertani, Andrea ReCecconi, Silvia Maestroni, Gianpaolo Zerbini, Paolo Nucci, Tiziana Borsello
Recently a range of ocular manifestations such as retinal and lens amyloid-beta accumulation and retinal nerve fiber layer loss have been proposed as potential biomarkers in Alzheimer disease (AD). The TgCRND8 mouse model of AD exhibits age-dependent amyloid β (Aβ) oligomers accumulation and cognitive defects, amyloid plaques and hyperphosphorylated Tau deposition and inflammation. We proved the correlation between ocular pathologies and AD, observing increased levels of p-APP and p-Tau, accumulation of Aβ oligomers in the retina, eye, and optic nerve...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137019/optical-coherence-tomography-angiography-in-patients-with-diabetic-retinopathy-treated-with-anti-vegf-intravitreal-injections-case-report
#14
Katarzyna Michalska-Małecka, Anna Heinke Knudsen
PURPOSE: To present optical coherence tomography angiography (OCTA) features in patients with diabetic retinopathy (DR) at the baseline and in response to treatment with anti-VEGF intravitreal injections. To investigate the role of OCTA in management of patients with DR. METHODS: Retrospective case series showing primary outcomes of 3 patients with DR and diabetic macular edema. Patients were injected intravitreally a loading phase of 3 monthly 2.0 mg aflibercept, followed by 2 injections bimonthly (5 injections in total)...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135888/exit-strategy-in-a-treat-and-extend-regimen-for-exudative-age-related-macular-degeneration
#15
Petra Arendt, Siqing Yu, Marion R Munk, Andreas Ebneter, Sebastian Wolf, Martin S Zinkernagel
PURPOSE: To evaluate the outcome of an exit strategy in a treat-and-extend regimen for neovascular age-related macular degeneration. METHODS: Five hundred and ninety-eight eyes of 488 patients with neovascular age-related macular degeneration receiving intravitreal anti-vascular endothelial growth factor injections according to a treat-and-extend regimen were included in this retrospective study. A treat-and-extend regimen with either interval extension by 2 weeks or shortening by 1 week was used...
November 9, 2017: Retina
https://www.readbyqxmd.com/read/29135812/optic-nerve-head-drusen-the-relationship-between-intraocular-pressure-and-optic-nerve-structure-and-function
#16
Kaitlyn W Nolan, Michael S Lee, Rohan A Jalalizadeh, Kevin C Firl, Gregory P Van Stavern, Collin M McClelland
OBJECTIVE: To determine whether at the time of diagnosis, the intraocular pressure (IOP) in patients with optic nerve head drusen (ONHD) correlates with the perimetric mean deviation (PMD) and the mean retinal nerve fiber layer (RNFL) thickness on optical coherence tomography (OCT). METHODS: This retrospective chart review included adults with ONHD from 2 academic medical centers. Inclusion criteria were age older than 18 years, definitive diagnosis of ONHD, measurement of IOP, and an automated visual field (VF) within 3 months of diagnosis...
November 9, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29135803/vascular-abnormalities-in-diabetic-retinopathy-assessed-with-swept-source-optical-coherence-tomography-angiography-widefield-imaging
#17
Karen B Schaal, Marion R Munk, Iris Wyssmueller, Lieselotte E Berger, Martin S Zinkernagel, Sebastian Wolf
PURPOSE: To detect vascular abnormalities in diabetic retinopathy using swept-source optical coherence tomography angiography (SS-OCTA) widefield images, and to compare the findings with color fundus photographs (CFPs) using Early Treatment Diabetic Retinopathy Study severity grading. METHODS: 3 mm × 3 mm and 12 mm × 12 mm scans were acquired to cover 70° to 80° of the posterior pole using a 100-kHz SS-OCTA instrument. Two masked graders assessed the presence of vascular abnormalities on SS-OCTA and the Early Treatment Diabetic Retinopathy Study level on CFP...
November 10, 2017: Retina
https://www.readbyqxmd.com/read/29135802/panretinal-photocoagulation-versus-ranibizumab-for-proliferative-diabetic-retinopathy-comparison-of-peripapillary-retinal-nerve-fiber-layer-thickness-in-a-randomized-clinical-trial
#18
Lee M Jampol, Isoken Odia, Adam R Glassman, Carl W Baker, Anjali M Bhorade, Dennis P Han, Glenn J Jaffe, Michele Melia, Neil M Bressler, Angelo P Tanna
PURPOSE: Compare changes in retinal nerve fiber layer (RNFL) thickness between eyes assigned to intravitreous ranibizumab or panretinal photocoagulation and assess correlations between changes in RNFL and visual field sensitivity and central subfield thickness. METHODS: Eyes with proliferative diabetic retinopathy were randomly assigned to ranibizumab or panretinal photocoagulation. Baseline and annual follow-up spectral domain optical coherence tomography RNFL imaging, optical coherence tomography macular imaging, and automated static perimetry (Humphrey visual field 60-4 algorithm) were performed...
November 10, 2017: Retina
https://www.readbyqxmd.com/read/29135801/timing-and-outcome-of-surgery-for-persistent-macular-hole
#19
Rutul Patel, Mahesh Gopalakrishnan, Anantharaman Giridhar
PURPOSE: To evaluate the efficacy and optimum timing for resurgery in case of persistent macular hole (MH). METHODS: Twenty-five eyes of 25 patients who underwent fluid-air exchange with intravitreal C3F8 for persistent MH after vitrectomy + internal limiting membrane peeling + SF6 were included in the study. Best-corrected visual acuity, optical coherence tomography features including base diameter and configuration of MH, and time duration between the two surgeries were noted...
November 10, 2017: Retina
https://www.readbyqxmd.com/read/29135798/vitrectomy-with-subretinal-tissue-plasminogen-activator-and-gas-tamponade-for-subfoveal-hemorrhage-prognostic-factors-and-clinical-outcomes
#20
David J A Plemel, Steven R J Lapere, Christopher J Rudnisky, Matthew T S Tennant
PURPOSE: To study the prognostic factors and clinical outcomes of patients who underwent pars plana vitrectomy, subretinal injection of tissue plasminogen activator, and gas tamponade for the treatment of subfoveal hemorrhage (SFH). METHODS: A retrospective noncomparative interventional case series. RESULTS: Seventy-eight eyes from 77 patients were included. A total of 84.6% of eyes developed SFH from age-related macular degeneration. Partial or complete displacement of the SFH was achieved in 91...
November 10, 2017: Retina
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