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optic coherence tomography

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https://www.readbyqxmd.com/read/28329344/bas-relief-in-three-dimensional-optical-coherence-tomography-a-novel-sign-after-subintimal-scaffolding-in-a-chronic-total-occlusion
#1
Carlos Cortés, Milosz Jaguszewski, Ignacio J Amat-Santos, Juan Luis Gutiérrez-Chico
No abstract text is available yet for this article.
March 17, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329070/paclitaxel-crystals-on-the-surface-of-a-bioresorbable-vascular-scaffold-visualized-by-optical-coherence-tomography-after-drug-eluting-balloon-angioplasty
#2
María López-Benito, Armando Pérez de Prado, Carlos Cuellas, Rodrigo Estévez, Felipe Fernández-Vázquez
No abstract text is available yet for this article.
February 27, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329036/predictive-value-of-plaque-morphology-assessed-by-frequency-domain-optical-coherence-tomography-for-impaired-microvascular-perfusion-after-elective-stent-implantation-the-intracoronary-electrocardiogram-study
#3
Hiroki Ikenaga, Satoshi Kurisu, Tsukasa Nakao, Shingo Kono, Yoji Sumimoto, Noriaki Watanabe, Takashi Shimonaga, Tadanao Higaki, Toshitaka Iwasaki, Naoya Mitsuba, Ken Ishibashi, Yoshihiro Dohi, Yukihiro Fukuda, Yasuki Kihara
Aims: This study was undertaken to assess the association between plaque features at culprit lesions assessed by frequency-domain optical coherence tomography (FD-OCT) and impaired microvascular perfusion estimated by intracoronary electrocardiogram (IcECG) after elective percutaneous coronary intervention (PCI). Furthermore, we investigated whether IcECG could predict future cardiac events. Methods and results: This study consisted of 84 patients who underwent both FD-OCT and IcECG during PCI...
March 7, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28328978/thickness-of-retinal-layers-in-the-foveas-of-children-with-anisometropic-amblyopia
#4
Wuhe Chen, Jinling Xu, Jinjing Zhou, Zhouqun Gu, Shenghai Huang, Heming Li, Zhuoer Qin, Xinping Yu
PURPOSE: To use highly precise spectral-domain optical coherence tomography (SD-OCT) to determine whether there were structural abnormalities in the layers of different regions of the fovea in children with anisometropic amblyopia. METHODS: Eighteen children (mean age 7.8 years old; range 5-11 years) with unilateral anisometropic amblyopia and 18 age-matched control subjects participated. Foveal thickness was measured with an enhanced depth imaging system, SD-OCT and segmented into layers using custom developed software...
2017: PloS One
https://www.readbyqxmd.com/read/28328965/peripheral-blood-metabolic-and-inflammatory-factors-as-biomarkers-to-ocular-findings-in-diabetic-macular-edema
#5
Marc Figueras-Roca, Blanca Molins, Anna Sala-Puigdollers, Jessica Matas, Irene Vinagre, José Ríos, Alfredo Adán
AIMS: To study the association between peripheral blood metabolic and inflammatory factors and presence of diabetic macular edema (DME) and its related anatomic features in type 2 diabetic mellitus (T2DM) patients. MATERIAL AND METHODS: Observational cross-sectional study on a proof of concept basis. Seventy-six T2DM included patients were divided based on the presence (n = 58) or absence of DME (n = 18) according to optical coherence tomography (OCT). Ultra-widefield fluorescein angiography (UWFA) was performed in DME patients...
2017: PloS One
https://www.readbyqxmd.com/read/28328783/iatrogenic-left-circumflex-vessel-occlusion-after-minimal-access-mitral-valve-repair-the-role-of-optical-coherence-tomography
#6
Hesham K Abdelaziz, Andrew Wiper, Palanikumar Saravanan, Joseph Zacharias
No abstract text is available yet for this article.
March 21, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28327553/choroidal-thickness-in-3001-chinese-children-aged-6-to-19-years-using-swept-source-oct
#7
Shuyu Xiong, Xiangui He, Junjie Deng, Minzhi Lv, Jiali Jin, Sifei Sun, Chunxia Yao, Jianfeng Zhu, Haidong Zou, Xun Xu
The purpose of the cross-sectional study is to describe the values and distribution of choroidal thickness and to explore its related factors, especially age, in Chinese children. A total of 3001 Chinese school children aged 6 to 19 years underwent comprehensive ophthalmic examinations, including axial length and cycloplegic refraction. Choroidal thickness was measured by swept-source optical coherence tomography (SS-OCT). There was a greater difference in the more central regions between the myopes and emmetropes...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28326324/three-dimensional-human-cardiac-tissue-engineered-by-centrifugation-of-stacked-cell-sheets-and-cross-sectional-observation-of-its-synchronous-beatings-by-optical-coherence-tomography
#8
Yuji Haraguchi, Akiyuki Hasegawa, Katsuhisa Matsuura, Mari Kobayashi, Shin-Ichi Iwana, Yasuhiro Kabetani, Tatsuya Shimizu
Three-dimensional (3D) tissues are engineered by stacking cell sheets, and these tissues have been applied in clinical regenerative therapies. The optimal fabrication technique of 3D human tissues and the real-time observation system for these tissues are important in tissue engineering, regenerative medicine, cardiac physiology, and the safety testing of candidate chemicals. In this study, for aiming the clinical application, 3D human cardiac tissues were rapidly fabricated by human induced pluripotent stem (iPS) cell-derived cardiac cell sheets with centrifugation, and the structures and beatings in the cardiac tissues were observed cross-sectionally and noninvasively by two optical coherence tomography (OCT) systems...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28324116/thick-prelaminar-tissue-decreases-lamina-cribrosa-visibility
#9
Katie A Lucy, Bo Wang, Joel S Schuman, Richard A Bilonick, Yun Ling, Larry Kagemann, Ian A Sigal, Ireneusz Grulkowski, Jonathan J Liu, James G Fujimoto, Hiroshi Ishikawa, Gadi Wollstein
Purpose: Evaluation of the effect of prelaminar tissue thickness on visualization of the lamina cribrosa (LC) using optical coherence tomography (OCT). Methods: The optic nerve head (ONH) region was scanned using OCT. The quality of visible LC microstructure was assessed subjectively using a grading system and objectively by analyzing the signal intensity of each scan's superpixel components. Manual delineations were made separately and in 3-dimensions quantifying prelaminar tissue thickness, analyzable regions of LC microstructure, and regions with a visible anterior LC (ALC) boundary...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28324111/arap1-deficiency-causes-photoreceptor-degeneration-in-mice
#10
Ala Moshiri, Devin Humpal, Brian C Leonard, Denise M Imai, Addy Tham, Lynette Bower, Dave Clary, Thomas M Glaser, K C Kent Lloyd, Christopher J Murphy
Purpose: Small guanosine triphosphatase (GTPase) ADP-ribosylation factors (Arfs) regulate membrane traffic and actin reorganization under the control of GTPase-activating proteins (GAPs). Arap1 is an Arf-directed GAP that inhibits the trafficking of epidermal growth factor receptor (EGFR) to the early endosome, but the diversity of its functions is incompletely understood. The aim of this study was to determine the role of Arap1 in the mammalian retina. Methods: Genetically engineered Arap1 knockout mice were screened for ocular abnormalities in the National Institutes of Health Knockout Mouse Production and Phenotyping (KOMP2) Project...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28323591/treatment-and-monitoring-of-central-serous-chorioretinopathy-in-pilots
#11
Ari Shinojima, Ryusaburo Mori, Kyoko Fujita, Mitsuko Yuzawa
BACKGROUND: Central serous chorioretinopathy (CSC), which has the characteristics of a serous retinal detachment (SRD) in the macular area, affects mostly men in the 30- to 50-yr age range. Some patients have persistent SRD, which may cause retinal thinning and photoreceptor impairment. CSC symptoms are gradual vision loss and/or metamorphopsia. Some commercial airline pilots are concerned about CSC symptoms, which can disqualify them from flying for months and can also reoccur. Thus, careful monitoring and treatment of CSC are critical for pilots, especially those with chronic or recurrent CSC...
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28322733/quantitative-analysis-of-retinal-structure-using-spectral-domain-optical-coherence-tomography-in-rpgr-associated-retinopathy
#12
James J L Tee, Joseph Carroll, Andrew R Webster, Michel Michaelides
PURPOSE: Quantification of retinal structure and progression using spectral-domain optical coherence tomography (SDOCT) in patients with retinitis pigmentosa (RP) associated with retinitis pigmentosa GTPase regulator gene (RPGR) mutations DESIGN: Retrospective observational case series METHODS: Setting: Moorfields Eye Hospital, London, United Kingdom. SUBJECTS: Both eyes of 32 patients. SDOCT follow-up period of >1 year (3.1±1.4 years). OUTCOME MEASURES: Ellipsoid zone (EZ) width (EZW), outer nuclear layer (ONL) and inner retinal layer (IRL) thickness measurements...
March 16, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28322323/anti-inflammatory-properties-of-shikonin-contribute-to-improved-early-stage-diabetic-retinopathy
#13
Po-Lin Liao, Cheng-Hui Lin, Ching-Hao Li, Chi-Hao Tsai, Jau-Der Ho, George C Y Chiou, Jaw-Jou Kang, Yu-Wen Cheng
Diabetic retinopathy (DR), a major microvascular complication of diabetes, leads to retinal vascular leakage, neuronal dysfunction, and apoptosis within the retina. In this study, we combined STZ with whole-body hypoxia (10% O2) for quicker induction of early-stage retinopathy in C57BL/6 mice. We also compared the effects of a high glucose condition combined with hypoxia (1% O2) to a low glucose condition by using retinal pigment epithelial (RPE) cells, which are a crucial component of the outer blood-retinal barrier and the damage is related to retinopathy...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28321986/monitoring-retinoschisis-and-non-acute-retinal-detachment-by-optical-coherence-tomography-morphologic-aspects-and-clinical-impact
#14
Katharina Eibenberger, Stefan Sacu, Sandra Rezar-Dreindl, Julia Pöcksteiner, Michael Georgopoulos, Ursula Schmidt-Erfurth
PURPOSE: To differentiate retinoschisis (RS) from non-acute retinal detachment (naRD) in clinical routine using optical coherence tomography (OCT), describe unique morphological OCT characteristics and monitor disease progression. METHODS: This prospective, observational study included 64 eyes of 44 patients with either RS or naRD. Patients were examined clinically and using Heidelberg Spectralis OCT(®) , Topcon DRI OCT(®) and Cirrus HRA-OCT(®) over 2 years with follow-up at 1, 3, 6, 12 and 24 months...
March 21, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28320964/in-vivo-optophysiology-reveals-that-g-protein-activation-triggers-osmotic-swelling-and-increased-light-scattering-of-rod-photoreceptors
#15
Pengfei Zhang, Robert J Zawadzki, Mayank Goswami, Phuong T Nguyen, Vladimir Yarov-Yarovoy, Marie E Burns, Edward N Pugh
The light responses of rod and cone photoreceptors have been studied electrophysiologically for decades, largely with ex vivo approaches that disrupt the photoreceptors' subretinal microenvironment. Here we report the use of optical coherence tomography (OCT) to measure light-driven signals of rod photoreceptors in vivo. Visible light stimulation over a 200-fold intensity range caused correlated rod outer segment (OS) elongation and increased light scattering in wild-type mice, but not in mice lacking the rod G-protein alpha subunit, transducin (Gαt), revealing these responses to be triggered by phototransduction...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28320686/characteristics-of-early-versus-late-in-stent-restenosis-in-second-generation-drug-eluting-stents-an-optical-coherence-tomography-study
#16
Lei Song, Gary S Mintz, Dong Yin, Myong Hwa Yamamoto, Chee Yang Chin, Mitsuaki Matsumura, Ajay J Kirtane, Manish A Parikh, Jeffrey W Moses, Ziad A Ali, Richard A Shlofmitz, Akiko Maehara
AIMS: In-stent restenosis (ISR) is an important cause of DES failure and target vessel revascularization. We evaluated differences between early and late-presenting restenosis in second-generation drug-eluting stents (DES) using optical coherence tomography (OCT). METHODS AND RESULTS: Overall, 171 cases of second-generation DES ISR with a follow-up OCT minimum lumen area <3.0mm2 were included; 33.3% of patients (n=57) had early ISR; and 67.7% (n=114) had late ISR (duration from stent implantation >1 year)...
March 21, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28320481/cystoid-macular-edema-associated-with-preservative-free-latanoprost-after-uncomplicated-cataract-surgery-case-report-and-review-of-the-literature
#17
Olga E Makri, Foteini N Tsapardoni, Panagiotis Plotas, Nikistratos Ifantis, Paraskevi T Xanthopoulou, Constantine D Georgakopoulos
BACKGROUND: Cystoid macular edema associated with latanoprost administration has been reported in patients after complicated cataract surgery with coexisting risk factors. We present the first case of preservative free latanoprost associated cystoid macular edema that occurred many months after uncomplicated cataract surgery. CASE PRESENTATION: A 65-year old Caucasian female presented in the Outpatients Clinic complaining of reduced vision and metamorphopsia in the right eye...
March 20, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28319641/correlation-of-visually-evoked-functional-and-blood-flow-changes-in-the-rat-retina-measured-with-a-combined-oct-erg-system
#18
Bingyao Tan, Erik Mason, Benjamin MacLellan, Kostadinka K Bizheva
Purpose: To correlate visually evoked functional and blood flow changes in the rat retina measured simultaneously with a combined optical coherence tomography and electroretinography system (OCT+ERG). Methods: Male Brown Norway (n = 6) rats were dark adapted and anesthetized with ketamine/xylazine. Visually evoked changes in the retinal blood flow (RBF) and functional response were measured simultaneously with an OCT+ERG system with 3-μm axial resolution in retinal tissue and 47-kHz image acquisition rate...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28319450/retinal-and-choroidal-thickness-in-adult-patients-with-familial-mediterranean-fever
#19
Tolga Bicer, Osman Celikay, Mustafa Kosker, Muhammed Yunus Alp, Cem Ozisler, Ahmet Yesilyurt, Burcu Kucuk Bicer, Canan Gurdal
PURPOSE: We aimed to evaluate changes in retinal, choroidal, ganglion cell complex (GCC) and retinal nerve fiber layer (RNFL) thicknesses in genetically diagnosed adult patients with familial Mediterranean fever (FMF). METHODS: A total of 50 eyes of 50 genetically diagnosed patients with FMF and 50 eyes of controls were analyzed. Patients were recruited from the Genetic Diagnostic Center of Dışkapı Yıldırım Beyazıt Research and Training Hospital, Turkey. Retinal and choroidal thicknesses were obtained using spectral-domain optical coherence tomography from choroid, retina, GCC, and RNFL...
March 20, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28319274/intraoperative-optical-coherence-tomography-for-soft-tissue-sarcoma-differentiation-and-margin-identification
#20
Kelly J Mesa, Laura E Selmic, Paritosh Pande, Guillermo L Monroy, Jennifer Reagan, Jonathan Samuelson, Elizabeth Driskell, Joanne Li, Marina Marjanovic, Eric J Chaney, Stephen A Boppart
BACKGROUND AND OBJECTIVE: Sarcomas are rare but highly aggressive tumors, and local recurrence after surgical excision can occur in up to 50% cases. Therefore, there is a strong clinical need for accurate tissue differentiation and margin assessment to reduce incomplete resection and local recurrence. The purpose of this study was to investigate the use of optical coherence tomography (OCT) and a novel image texture-based processing algorithm to differentiate sarcoma from muscle and adipose tissue...
March 20, 2017: Lasers in Surgery and Medicine
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