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Spectral domain optical coherence tomography

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https://www.readbyqxmd.com/read/28817571/automated-segmentation-of-mouse-oct-volumes-asimov-validation-clinical-study-of-a-light-damage-model
#1
Bhavna Josephine Antony, Byung-Jin Kim, Andrew Lang, Aaron Carass, Jerry L Prince, Donald J Zack
The use of spectral-domain optical coherence tomography (SD-OCT) is becoming commonplace for the in vivo longitudinal study of murine models of ophthalmic disease. Longitudinal studies, however, generate large quantities of data, the manual analysis of which is very challenging due to the time-consuming nature of generating delineations. Thus, it is of importance that automated algorithms be developed to facilitate accurate and timely analysis of these large datasets. Furthermore, as the models target a variety of diseases, the associated structural changes can also be extremely disparate...
2017: PloS One
https://www.readbyqxmd.com/read/28817420/optical-coherence-tomography-angiography-for-the-detection-of-secondary-choroidal-neovascularization-in-vitelliform-macular-dystrophy
#2
Martin Stattin, Daniel Ahmed, Carl Glittenberg, Ilse Krebs, Siamak Ansari-Shahrezaei
PURPOSE: Optical coherence tomography angiography (OCTA) is used to assess vascular abnormality in advanced stage vitelliform macular dystrophy (VMD2). METHODS: Multimodal imaging including spectral domain (SD) OCT, autofluorescence (AF), fluorescein (FA) and indocyanine green angiography (ICGA) as well as optical coherence tomography angiography were performed. PATIENTS: Two eyes in one young patient with diagnosed vitelliform macular dystrophy were investigated for progressive visual dysfunction...
August 16, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28816864/increased-photoreceptor-outer-segment-volume-following-systemic-treatment-of-birdshot-chorioretinopathy
#3
Gavin Docherty, Rosanna Martens, Farzin Forooghian
PURPOSE: Retinal degeneration in birdshot chorioretinopathy can be quantified using spectral domain optical coherence tomography by measuring the photoreceptor outer segment (PROS) volume. The purpose of this study was to determine if the PROS volume in BSCR responds to systemic immunomodulatory therapy (IMT). METHODS: Retrospective chart review with analysis of PROS volume derived from spectral domain optical coherence tomography. RESULTS: We identified a total of three patients who met our inclusion criteria...
August 14, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28816861/en-face-versus-12-line-radial-optical-coherence-tomography-scan-patterns-for-detection-of-macular-fluid-in-neovascular-age-related-macular-degeneration
#4
Murtaza K Adam, Abtin Shahlaee, Wasim A Samara, Joseph I Maguire, Allen C Ho, Jason Hsu
PURPOSE: To compare fluid detection of autosegmented en face to 12-line radial spectral domain optical coherence tomography scan patterns in neovascular age-related macular degeneration. METHODS: Retrospective observational case series. Sixty-seven patients (94 eyes) with neovascular age-related macular degeneration underwent autosegmented en face optical coherence tomography (with associated 304-line raster scan) and 12-line radial scan patterns. Sensitivity and specificity of fluid detection for en face scan and 12-line radial scans were determined by combining radial and 304-line raster scans as a gold standard...
August 14, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28814750/the-linear-artifact-in-enhanced-depth-imaging-spectral-domain-optical-coherence-tomography
#5
Chengguo Zuo, Lan Mi, Shasha Yang, Xinxing Guo, Hui Xiao, Xing Liu
Optical coherence tomography (OCT) is a valuable ancillary test in the diagnosis and management of chorioretinal disease. The evaluation of choroid thickness using OCT has become the focus of clinical applications. We report a linear artifact that acts as a confounding factor in choroidal thickness measurements by enhanced depth imaging OCT. We found that the linear artifact is located stably at a depth of 485 μm beneath the retinal pigment epithelium in 81.88% of subjects. The study suggested that the linear artifact was a confounding factor in assessing choroidal thickness and that caution should be used in the interpretation of the choroidal thickness, especially when it is approximately 485 μm...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28813577/spatial-correspondence-between-intraretinal-fluid-subretinal-fluid-and-pigment-epithelial-detachment-in-neovascular-age-related-macular-degeneration
#6
Sophie Klimscha, Sebastian M Waldstein, Thomas Schlegl, Hrvoje Bogunovic, Amir Sadeghipour, Ana-Maria Philip, Dominika Podkowinski, Eleonore Pablik, Li Zhang, Michael D Abramoff, Milan Sonka, Bianca S Gerendas, Ursula Schmidt-Erfurth
Purpose: To identify the spatial distribution of exudative features of choroidal neovascularization in neovascular age-related macular degeneration (nAMD) based on the localization of intraretinal cystoid fluid (IRC), subretinal fluid (SRF), and pigment-epithelial detachment (PED). Methods: This retrospective cross-sectional study included spectral-domain optical coherence tomography volume scans (6 × 6 mm) of 1341 patients with treatment-naïve nAMD. IRC, SRF, and PED were detected on a per-voxel basis using fully automated segmentation algorithms...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28812133/-watchful-waiting-as-a-therapeutic-principle-for-diseases-of-the-vitreoretinal-interface
#7
REVIEW
H Hoerauf, B Kirchhof
Elective surgery of the vitreoretinal interface is currently the most common reason for vitrectomy in Germany. The evaluation and correct interpretation of spectral domain optical coherence tomography (SD-OCT) images is of great importance but the indications for vitrectomy in macular surgery should be based more on patient symptoms and not only the OCT findings. Watchful waiting is highlighted as an alternative therapeutic option in individual patients. This article addresses a number of aspects and discrepancies between findings and patients' level of suffering based on binocular symptoms...
August 15, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28811934/the-estimates-of-retinal-ganglion-cell-counts-performed-better-than-isolated-structure-and-functional-tests-for-glaucoma-diagnosis
#8
Bruno L B Esporcatte, Andrea C Kara-José, Luiz Alberto S Melo, Luciano M Pinto, Ivan M Tavares
PURPOSE: To evaluate the diagnostic accuracy of retinal ganglion cell (RGC) counts as estimated by combining data from standard automated perimetry (SAP) and spectral domain optical coherence tomography (SD-OCT). METHODS: Healthy individuals and glaucoma patients were included in this cross-sectional study. All eyes underwent 24-2 SITA SAP and structural imaging tests. RGC count estimates were obtained using a previously described algorithm, which combines estimates of RGC numbers from SAP sensitivity thresholds and SD-OCT retinal nerve fiber layer (RNFL) average thickness...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28811895/long-term-rearrangement-of-retinal-structures-in-a-novel-mutation-of-x-linked-retinoschisis
#9
Stefano Piermarocchi, Stefania Miotto, Davide Colavito, Elda Del Giudice, Alberta Leon, Veronica Maritan, Rita Piermarocchi, Alma Patrizia Tormene
The aim of the present study was to report a novel mutation in the retinoschisin 1 (RS1) gene in a Caucasian family affected by X-linked juvenile retinoschisis (XLRS) and to describe the long-term modification of retinal structure. Two brothers with an early onset maculopathy were diagnosed with XLRS. Fundus photography, fluorescein angiography, spectral domain optical coherence tomography and electroretinogram analyses were performed. Their sister was also examined. All subjects were screened for mutations in the RS1 gene...
September 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28810043/amalric-triangular-syndrome-associated-with-outer-nuclear-layer-infarction
#10
Sean T Garrity, Eric J Holz, David Sarraf
An 85-year-old man presented with temporal headache and bilateral paracentral scotomas. Clinical examination, laboratory testing, and temporal artery biopsy confirmed the diagnosis of giant cell arteritis. Fluorescein angiography illustrated Amalric triangular choroidal infarction of the left eye. Spectral-domain optical coherence tomography of the left eye demonstrated outer nuclear layer abnormalities adjacent to the choroidal infarct. [Ophthalmic Surg Lasers Imaging Retina. 2017;48:668-670.].
August 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28810041/morphologic-and-postoperative-fixation-characteristics-of-the-macular-epiretinal-membrane-in-young-patients-undergoing-surgery
#11
Tian Tian, Chunli Chen, Haiying Jin, Qi Zhang, Yu Xu, Shiyuan Wang, Xiang Zhang, Peiquan Zhao
BACKGROUND AND OBJECTIVE: To describe morphologic characteristics, surgical outcomes, postoperative preferred retinal loci (PRL), and fixation stability of epiretinal membranes (ERMs) in young patients. PATIENTS AND METHODS: This retrospective study analyzed 43 eyes of 41 young patients (age range: 0.8 years to 28 years) with ERMs, which were divided into two groups: secondary ERMs (SERMs; n = 28) and idiopathic ERMs (IERMs; n = 13). All 43 eyes underwent 25-gauge vitrectomy and membrane peeling...
August 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28807732/diagnostic-capability-of-peripapillary-3d-retinal-nerve-fiber-layer-volume-for-glaucoma-using-optical-coherence-tomography-volume-scans
#12
Ziad Khoueir, Firas Jassim, Linda Yi-Chieh Poon, Edem Tsikata, Geulah S Ben-David, Yingna Liu, Eric Shieh, Ramon Lee, Rong Guo, Georgia Papadogeorgou, Boy Braaf, Huseyin Simavli, Christian Que, Benjamin J Vakoc, Brett E Bouma, Johannes de Boer, Teresa C Chen
PURPOSE: To determine the diagnostic capability of peripapillary 3-dimensional (3D) retinal nerve fiber layer (RNFL) volume measurements from spectral domain optical coherence tomography (OCT) volume scans for open angle glaucoma (OAG). DESIGN: Assessment of diagnostic accuracy. METHODS: Setting: Academic clinical setting. STUDY POPULATION: 180 patients (113 OAG and 67 normal subjects). OBSERVATION PROCEDURES: One eye per subject was included...
August 11, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28806215/prevalence-of-vitreomacular-adhesion-in-patients-without-maculopathy-older-than-40-years
#13
Julie A Rodman, Diana Shechtman, Brad M Sutton, Joseph J Pizzimenti, Ava K Bittner
PURPOSE: To determine the prevalence and factors influencing vitreomacular adhesion (VMA) or vitreomacular traction (VMT) in subjects without maculopathy older than age 40 years. METHODS: In a prospective cross-sectional study, 1,950 eyes in 1,090 participants aged 40 to 89 years representing various ethnic groups from 14 centers in the United States underwent a comprehensive eye examination, including spectral domain optical coherence tomography. A team of independent, masked readers classified the presence or absence of VMA/VMT on spectral domain optical coherence tomography based on the International Vitreomacular Traction Study Group rubric...
August 10, 2017: Retina
https://www.readbyqxmd.com/read/28806214/choroidal-nevi-with-focal-choroidal-excavation-and-polypoidal-choroidal-neovascularization
#14
Daniel Simhaee, Rosa Dolz-Marco, K Bailey Freund
PURPOSE: To report two cases of choroidal nevi associated with focal choroidal excavation (FCE) and polypoidal choroidal neovascularization (PCN). METHODS: Report of two patients with choroidal nevi showing FCE and PCN who underwent multimodal imaging including color fundus photography, fluorescein angiography, indocyanine green angiography, fundus autofluorescence, spectral domain optical coherence tomography, swept-source optical coherence tomography, and optical coherence tomography angiography...
August 10, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28803250/optical-coherence-tomography-angiography-in-children-with-leber-coats-disease
#15
Michele Fortunato, Angela Turtoro, Gilda Cennamo
INTRODUCTION: The aim of this work was to describe the optical coherence tomography (OCT) angiography (OCTA) features in paediatric Leber-Coats disease. METHODS: Three children presenting with unilateral, clinically active Leber-Coats disease were evaluated using spectral domain OCT and OCTA. OCT angiograms were analysed and compared with the current literature. RESULTS: All 3 OCT angiograms showed that the vessels had lost most of their collateral branches and presented many loops...
August 12, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28801615/choroidal-remodeling-in-age-related-macular-degeneration-and-polypoidal-choroidal-vasculopathy-a-12-month-prospective-study
#16
Daniel Shu Wei Ting, Yasuo Yanagi, Rupesh Agrawal, Hwei Yee Teo, Sophia Seen, Ian Yew San Yeo, Ranjana Mathur, Choi Mun Chan, Shu Yen Lee, Edmund Yick Mun Wong, Doric Wong, Tien Yin Wong, Gemmy Chui Ming Cheung
Choroid thinning occurs in age-related macular degeneration (AMD). However, it remains unclear whether the reduction is due to reduction in choroidal vessels or shrinkage of choroidal stroma, or both. The purpose of this study was to evaluate the changes of the choroidal vascular and stromal area in 118 patients with typical AMD (t-AMD) and polypoidal choroidal vasculopathy (PCV) over a 12-month period. We used spectral-domain optical coherence tomography (SD-OCT) with enhanced depth imaging (EDI) mode to measure the subfoveal choroidal thickness (CT), central retinal thickness (CRT) and choroidal vascularity index (CVI - ratio of luminal area to total choroidal area)...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800651/vertical-macular-asymmetry-measures-derived-from-sd-oct-for-detection-of-early-glaucoma
#17
Farideh Sharifipour, Esteban Morales, Ji Woong Lee, JoAnn Giaconi, Abdelmonem A Afifi, Fei Yu, Joseph Caprioli, Kouros Nouri-Mahdavi
Purpose: To test the hypothesis that vertical asymmetry in macular ganglion cell/inner plexiform layer (GCIPL) thickness can improve detection of early glaucoma. Methods: Sixty-nine normal eyes and 101 glaucoma eyes had macular imaging with spectral-domain optical coherence tomography (OCT; 200 × 200 cube). The resulting GCIPL thickness matrix was grouped into a 20 × 20 superpixel array and superior superpixels were compared to their inferior counterparts. A global asymmetry index (AI) was defined as the grand mean of the asymmetry ratios...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28800018/the-expanding-clinical-spectrum-of-choroidal-excavation-in-macular-dystrophies
#18
Maurizio Battaglia Parodi, Giuseppe Casalino, Pierluigi Iacono, Ugo Introini, Tatevik Adamyan, Francesco Bandello
PURPOSE: To assess the prevalence and the clinical course of focal choroidal excavation (FCE) in patients affected by macular dystrophies. METHODS: Prospective case series. All the patients underwent a complete ophthalmologic examination, including best-corrected visual acuity and spectral domain optical coherence tomography. The presence of choroidal neovascularization (CNV) was assessed on the basis of the leakage detected on fluorescein angiography. RESULTS: A total of 162 eyes from 81 patients with macular dystrophy were included in the study...
August 9, 2017: Retina
https://www.readbyqxmd.com/read/28797550/optical-coherence-tomography-angiography-of-the-peripapillary-retina-in-primary-angle-closure-glaucoma
#19
Shunhua Zhang, Chan Wu, Liang Liu, Yali Jia, Yao Zhang, Yang Zhang, Hua Zhang, Yong Zhong, David Huang
PURPOSE: To measure the change of peripapillary retinal vessel density (VD) in eyes with a history of acute primary angle closure glaucoma (PACG). DESIGN: Case-control study. METHODS: Twenty-one consecutive Chinese patients with history of unilateral acute PACG were enrolled. Eyes with acute PACG constituted the case group, while the contralateral eyes without attack constituted the control. All patients underwent ophthalmic examinations including best-corrected visual acuity, intraocular pressure, and visual field (VF)...
August 7, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28796876/the-distribution-of-leakage-on-fluorescein-angiography-in-diabetic-macular-edema-a-new-approach-to-its-etiology
#20
Bilal Haj Najeeb, Christian Simader, Gabor Deak, Clemens Vass, Jutta Gamper, Alessio Montuoro, Bianca S Gerendas, Ursula Schmidt-Erfurth
Purpose: To determine the distribution of leakage on fluorescein angiography (FA) and explore the clinically protective role of astrocytes against damage to the inner blood retinal barrier (iBRB) in diabetic macular edema (DME). Methods: A consecutive case series of 87 eyes of 87 patients with DME was included. We measured the leakage area in each field of the Early Treatment Diabetic Retinopathy Study (ETDRS) grid on late-phase FA images. The normative thickness of the nerve fiber layer (NFL), in which the astrocytes are confined, was derived from a previous work using spectral-domain optical coherence tomography...
August 1, 2017: Investigative Ophthalmology & Visual Science
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