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optic coherent tomography

Qian Wang, Szy Yann Chan, Yanni Yan, Jingyan Yang, Wenjia Zhou, Jost B Jonas, Wen Bin Wei
PURPOSE: To examine the vascular density in different retinal layers and in the choriocapillaris in eyes with retinal vein occlusions (RVO). METHODS: Applying optical coherence tomography angiography (OCTA), we examined patients with unilateral RVOs and normal individuals of a control group. RESULTS: The study group included 48 patients with unilateral RVO and the control group 17 normal individuals. Eyes affected by RVO as compared to the contralateral unaffected eyes (all P < 0...
June 16, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
Mikkel Jensen, Niels Møller Israelsen, Michael Maria, Thomas Feuchter, Adrian Podoleanu, Ole Bang
In ultra-high resolution (UHR-) optical coherence tomography (OCT) group velocity dispersion (GVD) must be corrected for in order to approach the theoretical resolution limit. One approach promises not only compensation, but complete annihilation of even order dispersion effects, and that at all sample depths. This approach has hitherto been demonstrated with an experimentally demanding 'balanced detection' configuration based on using two detectors. We demonstrate intensity correlation (IC) OCT using a conventional spectral domain (SD) UHR-OCT system with a single detector...
June 15, 2018: Scientific Reports
Chikako Hara, Taku Wakabayashi, Hiroshi Toyama, Yoko Fukushima, Kaori Sayanagi, Shigeru Sato, Hirokazu Sakaguchi, Kohji Nishida
PURPOSE: To investigate the frequency and patient characteristics that influence anatomic response of intravitreal aflibercept in treatment-naïve neovascular age-related macular degeneration (AMD). DESIGN: Retrospective, interventional, consecutive case series. METHODS: Three hundred and sixty-five eyes of 365 patients with AMD who underwent 3 monthly intravitreal aflibercept treatments with follow-up for at least 12 months were investigated...
June 15, 2018: British Journal of Ophthalmology
Shaotao Zhang, Jiannan Dai, Haibo Jia, Sining Hu, Hongwei Du, Ning Li, Yongpeng Zou, Yanan Zou, Shenhong Jing, Yan Wang, Rong Sun, Bo Yu
BACKGROUND: Raised hemoglobinA1c (HbA1c) is an indicator of pre-diabetes, which is associated with increased risk of coronary artery disease. However, the detailed morphological characteristics of non-culprit plaques in acute coronary syndrome (ACS) patients remain largely unknown. METHODS: A total of 305 non-culprit plaques from 216 ACS patients were analyzed by intravascular optical coherence tomography. These patients were divided into three groups according to the serum glycosylated hemoglobin level: normal HbA1c (< 5...
June 15, 2018: Cardiovascular Diabetology
Jongkwan Park, Sungyun Lee, Jeongyeop You, Sanghun Park, Yujin Ahn, Woonggyu Jung, Kyung Hwa Cho
Resistance-in-series models have been applied to investigate fouling behavior. However, it is difficult to model the influence of morphology on fouling behavior because resistance is indirectly calculated from the water flux and transmembrane pressure. In this study, optical coherence tomography (OCT) was applied to evaluate the resistance of the fouling layer based on fouling morphology. Sodium alginate, humic acid, and bovine serum albumin (BSA) with high salts concentrations (conductivity: 23 mS/cm) were used as model foulants...
June 12, 2018: Science of the Total Environment
Mariana Ingolotti, Enrique Alfonso Roig Melo-Granados, Pedro Mario González-Madrigal, Humberto Ruiz García
PURPOSE: To report a case of central retinal artery occlusion in a patient with macular telangiectasia Type 2 using multimodal imaging. METHODS: Observational case report. RESULTS: A 58-year-old woman who presented with acute painless unilateral vision loss was diagnosed with central retinal artery occlusion in her right eye with macular telangiectasia Type 2 findings in both eyes. Fundus examination revealed retinal whitening with unusual cherry-red spot plus small crystalline deposits in the temporal macula...
June 13, 2018: Retinal Cases & Brief Reports
Yibing Zhang, Yuan Hu, Xiaodong Li, Xiaoru Shi, Feihong Xu, Hui Jia
The aim of the present study was to investigate the role of the limbal stem cells in corneal epithelial homeostasis in patients with peripheral corneal disease who received corneal transplantation surgery. This retrospective study enrolled 85 patients (85 eyes) with peripheral corneal lesion who underwent corneal transplantation at Department of Ophthalmology in First Hospital of Jilin University, Jilin, China. All patients during each follow-up period were examined for best corrected visual acuity, corneal reconstruction (assessed by slit-lamp biomicroscopy), anterior segment optical coherence tomography, and confocal microscopy...
June 2018: Experimental and Therapeutic Medicine
Rujuta A Katkar, Satyashankara Aditya Tadinada, Bennett T Amaechi, Daniel Fried
Optical coherence tomography (OCT) is a noninvasive diagnostic technique providing cross-sectional images of biologic structures based on the differences in tissue optical properties. OCT has been widely used in numerous clinical applications and is becoming popular as a promising technology in dentistry. Today, dental hard (tooth) and soft (hard palate mucosa and gingiva mucosa) tissues are visualized with OCT. With new developments in technology, the applications of OCT are being investigated in various fields in dentistry, such as to detect microleakage around restoration, tooth cracks/fractures, examination of periodontal tissues/pockets, early detection of oral cancerous tissues, and in endodontics for location of pulp canal...
July 2018: Dental Clinics of North America
Paola Conigliaro, Paola Triggianese, Gianluca Draghessi, Claudia Canofari, Gianluca Aloe, Maria Sole Chimenti, Claudia Valeri, Carlo Nucci, Roberto Perricone, Massimo Cesareo
BACKGROUND: Retinal involvement in systemic lupus erythematosus (SLE) and Sjögren syndrome (SS) may be subclinical and thus underdiagnosed. OBJECTIVES: We aimed at evaluating morphological and functional visual abnormalities in a cohort of SLE and SS patients in the absence of an overt clinical visual impairment. We also investigated potential associations between retinal disorders and disease activity, organ involvement, and treatment with steroid and/or hydroxychloroquine...
June 14, 2018: International Archives of Allergy and Immunology
Thanos D Papakostas, Szilárd Kiss
No abstract text is available yet for this article.
June 14, 2018: JAMA Ophthalmology
Thomas S Hwang, Ahmed M Hagag, Jie Wang, Miao Zhang, Andrew Smith, David J Wilson, David Huang, Yali Jia
Importance: Diabetic retinopathy (DR) is a leading cause of vision loss that is managed primarily through qualitative clinical examination of the retina. Optical coherence tomography angiography (OCTA) may offer an objective and quantitative method of evaluating DR. Objective: To quantify capillary nonperfusion in 3 vascular plexuses in the macula of eyes patients with diabetes of various retinopathy severity using projection-resolved OCTA (PR-OCTA). Design, Setting, and Participants: Cross-sectional study at a tertiary academic center comprising 1 eye each from healthy control individuals and patients with diabetes at different severity stages of retinopathy...
June 14, 2018: JAMA Ophthalmology
Maria Fernanda Abalem, David C Musch, David G Birch, Mark E Pennesi, John R Heckenlively, Thiran Jayasundera
BACKGROUND: To evaluate diurnal variations in macular schisis cavities in patients with X-linked juvenile retinoschisis (XLRS) with pathogenic variants in the RS1 gene using spectral-domain optical coherence tomography (SD-OCT). METHODS: Three consecutive patients with a clinical diagnosis of XLRS and pathogenic variants in the RS1, treated with carbonic anhydrase inhibitors (CAIs). Observational procedures: SD-OCT scans of the macula were acquired at 9 a.m., 1 p...
June 14, 2018: Ophthalmic Genetics
Stephen Wai Luen Lee, Frankie C C Tam, Kelvin K W Chan, Simon C C Lam, Shun-Ling Kong, Catherine P Shea, Michael K L Wong, Anthony Y T Wong, Arthur S Y Yung, Li-Wei Zhang, Yui-Ming Lam, Gary S Mintz, Ricardo A Costa, Hans-Peter Stoll, Akiko Maehara
AIMS: In patients at high bleeding risk treated with 1 month of dual antiplatelet therapy, the polymer-free, biolimus A9-coated BioFreedom stent (BFS) was found safer and more efficacious than bare metal stents. We used sequential optical coherence tomography (OCT) to assess the time course of strut coverage and neointimal transformation from 1 to 9 months. METHODS AND RESULTS: We randomly assigned 104 BFS recipients to 1 of 5 groups with angiography and OCT follow-up at 1, 2, 3, 4, or 5 months, together with another follow-up for all at 9 months...
June 12, 2018: EuroIntervention
Jose Maria de la Torre Hernandez, Nieves Gonzalo, Imanol Otaegui, Jose R Rumoroso, Hipólito Gutiérrez, Fernando Alfonso, Gerard Marti, Ana Serrador Frutos, Salvatore Brugaletta, Antonio Gomez Menchero, Tamara Garcia Camarero, Corina Biagioni, Javier Escaned
AIMS: We sought to compare vascular healing with bioresorbable everolimus-eluting vascular scaffolds (BVS) and drug-eluting stents with bioabsorbable polymers (BP-DES) at 6 and 12 months implanted both in same patients. METHODS AND RESULTS: Multicenter and prospective study including patients with at least two comparable lesions to treat. In every patient both BVS and BP-DES (Synergy™, Orsiro™ or Biomatrix Flex™) were implanted by lesion randomization. Patients included were evaluated with optical coherence tomography at 6 or 12 months (2:1)...
June 12, 2018: EuroIntervention
Georgios Sideris, Nikolaos Magkoutis, Sebastian Voicu, Chantal Kang, Michel Bonneau, Demetris Yannopoulos, Claire Bal Dit Sollier, Jean-Guillaume Dillinger, Natacha Berge, Philippe Brouland, Patrick Henry, Ludovic Drouet
AIMS: We sought to develop a reproducible animal model for acute myocardial infarction (AMI) in adult atherosclerosis-prone pigs. METHODS AND RESULTS: A coil was placed in the right coronary artery or the left anterior descending artery in 26 downsized spontaneously hypercholesterolemic pigs and left untreated until thrombotic occlusion. Then, we crossed the thrombotic occlusion with a guidewire, followed by pre-dilatation, thrombus visualization with Optical Coherence Tomography (OCT) imaging and, finally, deployment of a stent and repeated OCT...
June 12, 2018: EuroIntervention
Andreas Baumbach, Alexandra J Lansky, Yoshi Onuma, Taku Asano, Thomas Johnson, Richard Anderson, Ferdinand Kiemeneij, Ming Zheng, Niels Van Royen, Ton Slagboom, Georg Vlachojannis, Bo Xu, Patrick Serruys, William Wijns
AIMS: Durable polymer drug-eluting stents (DP DES) may contribute to persistent inflammation, delayed endothelial healing and subsequent late DES thrombosis. The aim of this Optical Coherence Tomography (OCT) sub-study was to compare healing and neointimal coverage of a novel bioabsorbable polymer sirolimus-eluting stent (FIREHAWK®) (BP DES) versus the DP DES (XIENCE) at 90 days in an all comers patient population. METHODS AND RESULTS: The TARGET All Comers study is a prospective multicenter randomised post-market trial of 1656 patients randomised 1:1 to FIREHAWK or XIENCE at 21 centers in 10 European countries...
June 12, 2018: EuroIntervention
Mehmet Bulut, Muhammet Kazım Erol, Devrim Toslak, Melih Akidan, Ebru Kaya Başar, Hasan Fatih Çay
Objectives: This study aims to detect hydroxychloroquine (HCQ)-induced retinal toxicity at an earlier stage through the use of spectral-domain optical coherence tomography device, especially by measuring macular retinal ganglion cell-inner plexiform layer (RGC-IPL) thickness. Patients and methods: In this study, 92 eyes of 46 Caucasian female patients (mean age 53.6±8.1 years; range 32 to 69 years) who were taking HCQ were assigned to group 1, while 80 eyes of 40 age-matched Caucasian female control subjects (mean age 56...
March 2018: Archives of Rheumatology
Lara M Wurster, Laurin Ginner, Abhishek Kumar, Matthias Salas, Andreas Wartak, Rainer A Leitgeb
We demonstrate in vivo endoscopic optical coherence tomography (OCT) imaging in the forward direction using a flexible fiber bundle (FB). In comparison to current conventional forward-looking probe schemes, our approach simplifies the endoscope design by avoiding the integration of any beam steering components in the distal probe end due to two-dimensional scanning of a focused light beam over the proximal FB surface. We describe the challenges that arise when OCT imaging with an FB is performed, such as multimoding or cross coupling...
June 2018: Journal of Biomedical Optics
Hiroyuki Yamamoto, Naofumi Yoshida, Toshiro Shinke, Hiromasa Otake, Masaru Kuroda, Kazuhiko Sakaguchi, Yushi Hirota, Takayoshi Toba, Hachidai Takahashi, Daisuke Terashita, Kenzo Uzu, Natsuko Tahara, Yuto Shinkura, Kouji Kuroda, Yoshinori Nagasawa, Yuichiro Nagano, Yoshiro Tsukiyama, Ken-Ichi Yanaka, Takuo Emoto, Naoto Sasaki, Tomoya Yamashita, Wataru Ogawa, Ken-Ichi Hirata
Data presented in this article are supplementary material to our research article entitled "Impact of CD14++ CD16+ monocytes on coronary plaque vulnerability assessed by optical coherence tomography in coronary artery disease patients" [1]. This article contains the data of study population, diagnostic ability of CD14++ CD16+ monocytes to identify thin-cap fibroatheromas, and association between laboratory variables and plaque properties.
June 2018: Data in Brief
Rupak Roy, Kumar Saurabh, Chinmayi Vyas, Kaustubh Deshmukh, Preeti Sharma, Dhileesh P Chandrasekharan, Aditya Bansal
AIM: This study aims to study normative choroidal thickness (CT) and Haller's and Sattler's layers thickness in normal Indian eyes. MATERIALS AND METHODS: The choroidal imaging of 73 eyes of 43 healthy Indian individuals was done using enhanced depth imaging feature of spectralis optical coherence tomography. Rraster scan protocol centered at fovea was used for imaging separately by two observers. CT was defined as the length of the perpendicular line drown from the outer border of hypereflective RPE-Bruch's complex to inner margin of choroidoscleral junction...
January 2018: Middle East African Journal of Ophthalmology
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