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https://www.readbyqxmd.com/read/28226752/classification-of-sd-oct-volumes-with-multi-pyramids-lbp-and-hog-descriptors-application-to-dme-detections
#1
Khaled Alsaih, Guillaume Lemaitre, Join Massich Vall, Mojdeh Rastgoo, Desire Sidibe, Tien Y Wong, Ecosse Lamoureux, Dan Milea, Carol Y Cheung, Fabrice Meriaudeau, Khaled Alsaih, Guillaume Lemaitre, Join Massich Vall, Mojdeh Rastgoo, Desire Sidibe, Tien Y Wong, Ecosse Lamoureux, Dan Milea, Carol Y Cheung, Fabrice Meriaudeau, Guillaume Lemaitre, Dan Milea, Carol Y Cheung, Desire Sidibe, Ecosse Lamoureux, Join Massich Vall, Mojdeh Rastgoo, Fabrice Meriaudeau, Tien Y Wong, Khaled Alsaih
This paper deals with the automated detection of Diabetic Macular Edema (DME) on Optical Coherence Tomography (OCT) volumes. Our method considers a generic classification pipeline with preprocessing for noise removal and flattening of each B-Scan. Features such as Histogram of Oriented Gradients (HOG) and Local Binary Patterns (LBP) are extracted and combined to create a set of different feature vectors which are fed to a linear-Support Vector Machines (SVM) Classifier. Experimental results show a promising sensitivity/specificity of 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225724/outer-retinal-tubulation-in-retinal-dystrophies
#2
Imoro Z Braimah, Sunila Dumpala, Jay Chhablani
BACKGROUND/PURPOSE: To evaluate the occurrence and characteristics of outer retinal tubulation (ORT) in an Indian population with retinal dystrophies. METHODS: In this retrospective study, 309 eyes of 157 patients with retinal dystrophies including retinitis pigmentosa (RP, 183 eyes), Stargardt disease (STGD, 93 eyes) and Best disease (33 eyes) were reviewed. The demographic details, clinical data including visual acuity, treatment history and good quality spectral domain optical coherence tomography (SD-OCT) scans were collected...
March 2017: Retina
https://www.readbyqxmd.com/read/28214955/ranibizumab-versus-aflibercept-for-macular-edema-due-to-central-retinal-vein-occlusion-18-month-results-in-real-life-data
#3
Irini Chatziralli, George Theodossiadis, Marilita M Moschos, Panagiotis Mitropoulos, Panagiotis Theodossiadis
PURPOSE: The objective of this study was to compare the anatomical and functional outcomes of ranibizumab versus aflibercept for the treatment of macular edema due to central retinal vein occlusion (CRVO) in routine clinical practice. METHODS: Participants in this observational study included 62 treatment-naïve patients with CRVO who received intravitreal injections of either ranibizumab or aflibercept. The demographic data, best-corrected visual acuity (BCVA) and spectral-domain optical coherence tomography (SD-OCT) characteristics were evaluated at baseline and at months 1, 2, 3, 6, 12 and 18 post-treatment...
February 18, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28208185/evaluation-of-progressive-visual-dysfunction-and-retinal-degeneration-in-patients-with-parkinson-s-disease
#4
Maria Satue, Maria J Rodrigo, Javier Obis, Elisa Vilades, Hector Gracia, Sofia Otin, Maria I Fuertes, Raquel Alarcia, Jose A Crespo, Vicente Polo, Jose M Larrosa, Luis E Pablo, Elena Garcia-Martin
Purpose: To quantify changes in visual function parameters and in the retinal nerve fiber layer and macular thickness over a 5-year period in patients with Parkinson's disease (PD). Methods: Thirty patients with PD and 30 healthy subjects underwent a complete ophthalmic evaluation, including assessment of visual acuity, contrast sensitivity vision, color vision, and retinal evaluation with spectral-domain optical coherence tomography (SD-OCT). All subjects were reevaluated after 5 years to quantify changes in visual function parameters, the retinal nerve fiber layer, and macular thickness...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28205530/retinal-structure-and-function-in-eyes-with-optic-nerve-hypoplasia
#5
Satoshi Katagiri, Sachiko Nishina, Tadashi Yokoi, Masashi Mikami, Yuri Nakayama, Michiko Tanaka, Noriyuki Azuma
We investigated retinal structure and function in eyes with optic nerve hypoplasia (ONH). Twenty-nine eyes of 18 patients with ONH and 21 eyes of 21 control patients were analyzed. Spectral-domain optical coherence tomography (SD-OCT), full-field electroretinography (FF-ERG), and focal macular ERG (FM-ERG) were performed. SD-OCT analysis of the macular region showed significant ganglion cells complex (GCC) thinning nasally and temporally (P < 0.05), but the thickness from the inner nuclear layer (INL) to the retinal pigment epithelium (RPE) became thinner only nasally (P < 0...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28203470/unusual-presentation-of-type-1-idiopathic-macular-telangiectasia
#6
Zaïnab Bentaleb Machkour, Philippe Denis, Laurent Kodjikian
Purpose. To report unusual presentation of type 1A idiopathic macular telangiectasia (IMT). Methods. Two middle-aged women with bilateral IMT were examined. Results. Both patients presented with a gradual vision loss in both eyes. Fundus examination was unremarkable in one case and showed small macular telangiectasia in both eyes in the other case. Fluorescein angiography (FA) revealed early bilateral macular punctuated hyperfluorescence corresponding to the dilated capillaries in both cases. FA and fundus examination confirmed also the absence of vascular abnormalities in the middle or anterior fundus periphery in one case...
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/28202480/multimodal-imaging-findings-in-hyper-early-stage-mewds
#7
Armelle Cahuzac, Benjamin Wolff, Thibaud Mathis, Marie-Hélène Errera, José-Alain Sahel, Martine Mauget-Faÿsse
OBJECTIVE: To describe a new stage of multiple evanescent white dot syndrome (MEWDS), occurring at a very early phase of the disease. METHODS: Retrospective analysis of clinical, angiographic and tomographic findings in four patients with 'hyper-early' stage MEWDS. RESULTS: In four patients seen within 1 week of the onset of symptoms, fundus analysis revealed macular granity and the classic yellow-white dots, some having no corresponding hyperautofluorescent pattern...
February 15, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28196732/peripapillary-and-macular-vessel-density-in-patients-with-glaucoma-and-single-hemifield-visual-field-defect
#8
Adeleh Yarmohammadi, Linda M Zangwill, Alberto Diniz-Filho, Luke J Saunders, Min Hee Suh, Zhichao Wu, Patricia Isabel C Manalastas, Tadamichi Akagi, Felipe A Medeiros, Robert N Weinreb
PURPOSE: To compare hemifield differences in the vessel density of the peripapillary and macula in open-angle glaucoma eyes with visual field (VF) defect confined to one hemifield using optical coherence tomography angiography (OCT-A). DESIGN: Cross-sectional study. PARTICIPANTS: A total of 58 eyes of 58 patients with glaucoma with VF loss confined to a single hemifield and 28 healthy eyes. METHODS: Retinal vasculature information was summarized as circumpapillary vessel density (cpVD) and perifoveal vessel density (pfVD)...
February 10, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28196267/detection-of-minimally-visible-recurrent-retinoblastoma-by-hand-held-spectral-domain-optical-coherence-tomography
#9
Maria E Gonzalez-Montpetit, Wasim A Samara, George N Magrath, Carol L Shields
A 2-month-old male infant with bilateral familial retinoblastoma was treated with intravenous chemotherapy and focal adjuvant therapy. At 5 months of follow-up, fundus examination and ultrasonography disclosed no recurrence; however, hand-held spectral-domain optical coherence tomography (SD-OCT) demonstrated subclinical recurrence within a previous regression scar. Subsequent treatment led to flat scar. Hand-held SD-OCT can be a useful tool for detection of subclinical recurrent retinoblastoma. [J Pediatr Ophthalmol Strabismus...
February 14, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28196059/quantification-of-intraretinal-hard-exudates-in-eyes-with-diabetic-retinopathy-by-optical-coherence-tomography
#10
Sowmya Srinivas, Muneeswar G Nittala, Amirhossein Hariri, Maximilian Pfau, Julie Gasperini, Michael Ip, SriniVas R Sadda
PURPOSE: To evaluate the reproducibility of intraretinal hard exudate (HE) quantification from spectral domain optical coherence tomography (SD-OCT) images of eyes with diabetic retinopathy (DR). METHODS: Cases with diabetic macular edema were enrolled. The area of HE obtained by B-scan segmentation was compared with the area obtained by en face segmentation. RESULTS: The mean ± SD for the HE area was 1.78 ± 1.37 mm with B-scan segmentation and 0...
February 10, 2017: Retina
https://www.readbyqxmd.com/read/28196050/visualization-of-the-macula-in-gas-filled-eyes-spectral-domain-optical-coherence-tomography-versus-swept-source-optical-coherence-tomography
#11
Seong Joon Ahn, Seung Hoon Park, Byung Ro Lee
PURPOSE: To compare the visualization of the macula between spectral domain optical coherence tomography (SD-OCT) and swept-source OCT (SS-OCT) in gas-filled eyes. METHODS: Sixty-one patients with common indications of gas tamponade, including 27 with macular holes and 34 with rhegmatogenous retinal detachment, who were treated with vitrectomy and gas tamponade were imaged using both SD-OCT (3D-OCT 2000, Topcon, Tokyo, Japan) and SS-OCT (DRI-OCT, Topcon) at 1, 3, and 7 days after the surgery...
February 10, 2017: Retina
https://www.readbyqxmd.com/read/28195615/quantitative-analysis-of-en-face-spectral-domain-optical-coherence-tomography-imaging-in-polypoidal-choroidal-vasculopathy
#12
Joseph M Simonett, Errol W Chan, Jonathan Chou, Dimitra Skondra, Daniel Colon, Caroline K Chee, Gopal Lingam, Amani A Fawzi
BACKGROUND AND OBJECTIVE: Spectral-domain optical coherence tomography (SD-OCT) imaging can be used to visualize polypoidal choroidal vasculopathy (PCV) lesions in the en face plane. Here, the authors describe a novel lesion quantification technique and compare PCV lesion area measurements and morphology before and after anti-vascular endothelial growth factor (VEGF) treatment. PATIENTS AND METHODS: Volumetric SD-OCT scans in eyes with PCV before and after induction anti-VEGF therapy were retrospectively analyzed...
February 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28195613/functional-and-morphological-evaluation-of-traumatized-eyes-with-berlin-s-edema-affecting-the-macula-using-mferg-microperimetry-and-sd-oct
#13
Joseph Daniel Boss, Joaquin Tosi, Inna Glybina, Asheesh Tewari, Gary W Abrams
BACKGROUND AND OBJECTIVE: To describe the structural and functional changes that occur in traumatic Berlin's edema involving the macula through assessment with multifocal electroretinogram (mfERG), microperimetry, fundus photography, and spectral-domain optical coherence tomography (SD-OCT). PATIENTS AND METHODS: Retrospective case series of five eyes from four patients with macular traumatic Berlin's edema. Patients underwent baseline mfERG (three eyes), MP1 microperimetry (three eyes), fundus photography (five eyes), and SD-OCT (five eyes)...
February 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28192564/a-japanese-family-with-autosomal-dominant-oculocutaneous-albinism-type-4
#14
Ryoko Oki, Kisaburo Yamada, Satoko Nakano, Kenichi Kimoto, Ken Yamamoto, Hiroyuki Kondo, Toshiaki Kubota
Purpose: We report the clinical characteristics of a Japanese family with autosomal dominant oculocutaneous albinism and a SLC45A2 gene mutation. Methods: A total of 16 members of a Japanese family with general hypopigmentation and foveal hypoplasia underwent detailed clinical examinations. We evaluated the severity of foveal hypoplasia using spectral-domain optical coherence tomography (SD-OCT) and graded it according to the criteria of Thomas et al. DNA was extracted from 17 family members and used for genome-wide single nucleotide polymorphism genotyping and linkage analysis...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28180131/semiautomated-segmentation-and-analysis-of-retinal-layers-in-three-dimensional-spectral-domain-optical-coherence-tomography-images-of-patients-with-atrophic-age-related-macular-degeneration
#15
Zhihong Hu, Yue Shi, Kiran Nandanan, Srinivas R Sadda
Historically, regular drusen and geographic atrophy (GA) have been recognized as the hallmarks of nonneovascular age-related macular degeneration (AMD). Recent imaging developments have revealed another distinct nonneovascular AMD phenotype, reticular pseudodrusen (RPD). We develop an approach to semiautomatically quantify retinal surfaces associated with various AMD lesions (i.e., regular drusen, RPD, and GA) in spectral domain (SD) optical coherence tomography (OCT) images. More specifically, a graph-based algorithm was used to segment multiple retinal layers in SD-OCT volumes...
January 2017: Neurophotonics
https://www.readbyqxmd.com/read/28180033/platform-independent-cirrus-and-spectralis-thickness-measurements-in-eyes-with-diabetic-macular-edema-using-fully-automated-software
#16
Alex S Willoughby, Stephanie J Chiu, Rachel K Silverman, Sina Farsiu, Clare Bailey, Henry E Wiley, Frederick L Ferris, Glenn J Jaffe
PURPOSE: We determine whether the automated segmentation software, Duke Optical Coherence Tomography Retinal Analysis Program (DOCTRAP), can measure, in a platform-independent manner, retinal thickness on Cirrus and Spectralis spectral domain optical coherence tomography (SD-OCT) images in eyes with diabetic macular edema (DME) under treatment in a clinical trial. METHODS: Automatic segmentation software was used to segment the internal limiting membrane (ILM), inner retinal pigment epithelium (RPE), and Bruch's membrane (BM) in SD-OCT images acquired by Cirrus and Spectralis commercial systems, from the same eye, on the same day during a clinical interventional DME trial...
February 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28178701/a-nonrandomized-open-label-multicenter-phase-4-pilot-study-on-the-effect-and-safety-of-iluvien%C3%A2-in-chronic-diabetic-macular-edema-patients-considered-insufficiently-responsive-to-available-therapies-respond
#17
João Figueira, José Henriques, Miguel Amaro, Vítor Rosas, Dalila Alves, José Cunha-Vaz
PURPOSE: The aim of this study was to assess the effectiveness and safety of ILUVIEN® in patients with chronic diabetic macular edema (DME) who were insufficiently responsive to prior therapies. METHODS: This is a prospective, nonrandomized, multicenter, open-label, phase 4 pilot study assessing the effectiveness and safety of ILUVIEN® involving 12 patients insufficiently responsive to available therapies. Assessments were performed at screening, baseline, week 1, and months 1, 3, 6, 9, and 12...
February 9, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28176950/circulating-monocytes-and-b-lymphocytes-in-neovascular-age-related-macular-degeneration
#18
Sven Magnus Hector, Torben Lykke Sørensen
BACKGROUND: Individuals with neovascular age-related macular degeneration (AMD) have altered number and distribution of retinal macrophages and show changes in circulating antibodies. We wanted to investigate the corresponding precursors, with subpopulations. We therefore measured monocyte and B-lymphocyte populations in individuals with neovascular AMD. DESIGN: This was an observational case-control study. PARTICIPANTS OR SAMPLES: A total of 31 individuals with neovascular AMD and 30 healthy age-matched controls were included...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28171859/comparison-of-55%C3%A2-wide-field-spectral-domain-optical-coherence-tomography-and-conventional-30%C3%A2-optical-coherence-tomography-for-the-assessment-of-diabetic-macular-edema
#19
Marion R Munk, Joel Lincke, Helena Giannakaki-Zimmermann, Andreas Ebneter, Sebastian Wolf, Martin S Zinkernagel
PURPOSE: To compare conventional 30° spectral domain optical coherence tomography (SD-OCT) with 55° wide-field SD-OCT for the assessment of diabetic macular edema (DME). METHODS: This study included 50 DME patients. Both 55° and 30° SD-OCT was conducted. Two readers evaluated scans according to a standardized grading protocol. Intergrader agreement as well as agreement between 30° and 55° SD-OCT were assessed. RESULTS: Intergrader agreement (κ) was strong and ranged from 0...
February 8, 2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28169922/choroidal-vessel-diameters-in-pseudoexfoliation-and-pseudoexfoliation-glaucoma-analyzed-using-spectral-domain-optical-coherence-tomography
#20
Soshian Sarrafpour, Mehreen Adhi, Jason Y Zhang, Jay S Duker, Chandrasekharan Krishnan
PURPOSE OF THE STUDY: The purpose of the study was to analyze choroidal vessel diameters in pseudoexfoliation (PXF) and pseudoexfoliation glaucoma (PXFG) using spectral-domain optical coherence tomography (SD-OCT). MATERIALS AND METHODS: Fifty patients (100 eyes) with PXF and PXFG who underwent high-definition 1-line raster SD-OCT imaging at New England Eye Center, Boston, were retrospectively identified and divided into unilateral PXFG (26 patients, 52 eyes), unilateral PXF (4 patients, 8 eyes), bilateral PXFG (4 patients, 8 eyes), and bilateral PXF (16 patients, 32 eyes)...
February 6, 2017: Journal of Glaucoma
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