Articles that mention Sun Yat-Sen University -Optical Coherence Tomography News

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1. Mentioned In 92 Articles
2. Optical coherence tomography angiography findings of neurovascular changes in type 2 diabetes mellitus patients without clinical diabetic retinopathy
  
  Explore Home - Springer Aug 4 2018 Ophthalmology
  
  Aims To evaluate the effect of early screening with OCTA in type 2 diabetes mellitus (T2DM) patients without clinical DR (NDR). Methods This was a cross-sectional casecontrol clinical study. Eighty-four eyes of 84 patients (44 T2DM and 40 control subjects) were included. Images were obtained using AngioVue software 2.0 of the OCTA device. Foveal avascular zone (FAZ) area, FAZ perimeter (PERIM), choriocapillary flow area (CCF), acircularity index (AI), foveal ...
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  Mentions: Sun Yat-Sen University
3. Analysis of peripapillary retinal nerve fiber layer and inner macular layers by spectral-domain optical coherence tomography for detection of early glaucoma
  
  Explore 欢迎访问国际眼科杂志编辑部 Jul 31 2018 Ophthalmology
  
  AIM : To analyze the diagnostic capabilities of peripapillary retinal nerve fiber layer (pRNFL) thickness and segmented inner macular layer (IML) thickness measured by spectral-domain optical coherence tomography for detection of early glaucoma. METHODS : Fifty-three patients with primary open angle glaucoma (POAG), 60 patients with normal tension glaucoma (NTG) and 32 normal control subjects were enrolled. Thicknesses of pRNFL, total macular layers (TML), and the IML, including macular RNFL (mRNFL) and ...
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  Mentions: Sun Yat-Sen University Chang Gung University
4. Efficient Deep Learning-Based Automated Pathology Identification in Retinal Optical Coherence Tomography Images
  
  Explore MDPI Open Access Journals Platform Jun 20 2018 Ophthalmology
  
  We present an automatic method based on transfer learning for the identification of dry age-related macular degeneration (AMD) and diabetic macular edema (DME) from retinal optical coherence tomography (OCT) images. The algorithm aims to improve the classification performance of retinal OCT images and shorten the training time. Firstly, we remove the last several layers from the pre-trained Inception V3 model and regard the remaining part as a fixed feature extractor ...
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  Mentions: Sun Yat-Sen University Tsinghua University
5. Correction of saturation effects in endoscopic swept-source optical coherence tomography based on dual-channel detection
  
  Explore SPIE Digital Library Mar 7 2018
  
  Saturation artifacts that are commonly observed in endoscopic swept-source optical coherence tomography (SSOCT) images cause image degradation and loss of image information. We present work on the correction of saturation effects in endoscopic SSOCT imaging. This method utilizes a broadband power divider with excellent pick-off flatness to divide the detected interference signal into the two channels of an analog-to-digital converter. Based on the precise calibration of the splitting ratio between ...
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  Mentions: Sun Yat-Sen University Jun Zhang
6. Association of skin autofluorescence with plaque vulnerability evaluated by optical coherence tomography in patients with cardiovascular disease
  
  Explore atherosclerosis-journal.com Mar 2 2018 Cardiology , Dermatology
  
  Background and aims Accumulation of advanced glycation end products (AGEs) can be measured non-invasively by skin autofluorescence (SAF) whose values are elevated in patients with cardiovascular disease (CVD). Optical coherence tomography (OCT) is an intravascular imaging modality that could allow visualization of plaque composition. We aim to examine the relationship between SAF and plaque composition evaluated by frequency-domain OCT in patients with CVD. Methods We prospectively enrolled 108 patients with ...
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  Mentions: Case Western Reserve University Sun Yat-Sen University Hiram G. Bezerra
7. Qualitative and quantitative assessment of posterior segment optical coherence tomography images using standard photos: the Liwan Eye Study
  
  Explore BMJ Open Dec 26 2017 Ophthalmology
  
  Background/aims To develop a standardised grading scheme, using standard photos, for spectral-domain ocular coherence tomography (SD-OCT) images of the posterior eye and evaluate the interobserver agreement among trained ophthalmologists in identifying pathological changes. Methods Subjects were recruited from Liwan District, Guangzhou, with SD-OCT data collection from June 2013 to November 2013 as part of 10-year follow-up visits from the Liwan Eye Study. All subjects underwent SD-OCT imaging of the ...
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  Mentions: Harvard University Sun Yat-Sen University University of Melbourne
8. Cross-correlation photothermal optical coherence tomography with high effective resolution
  
  Explore OSA | OSA Publishing Nov 30 2017
  
  We developed a cross-correlation photothermal optical coherence tomography (CC-PTOCT) system for photothermal imaging with high lateral and axial resolution. The CC-PTOCT system consists of a phase-sensitive OCT system, a modulated pumping laser, and a digital cross-correlator. The pumping laser was used to induce the photothermal effect in the sample, causing a slight phase modulation of the OCT signals. A spatial phase differentiation method was employed to reduce phase accumulation. The ...
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  Mentions: Sun Yat-Sen University South China Normal University
9. Re: Kwon et al.: Subclassification of primary angle closure using anterior segment optical coherence tomography and ultrasound biomicroscopic parameters (Ophthalmology. 2017;124:1039-1047)
  
  Explore Ophthalmology Sep 19 2017 Ophthalmology
  
  To the Editor: We read with interest the article by Sung et al. 1 In this observational study, the authors concluded that the most distinct difference between the 2 subgroups in the cluster analysis was trabecularciliary process angle (TCA) and that the position of the ciliary body is important in subclassifying primary angle closure. However, there are several limitations that may affect the results. First, in the study, the authors ...
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  Mentions: Sun Yat-Sen University
10. The linear artifact in enhanced depth imaging spectral domain optical coherence tomography
  
  Explore Nature Publishing Group Aug 16 2017
  
  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 m beneath the retinal pigment ...
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  Mentions: Sun Yat-Sen University
11. Diagnostic capability of peripapillary retinal nerve fiber layer parameters in time-domain versus spectral-domain optical coherence tomography for assessing glaucoma in high myopia
  
  Explore 欢迎访问国际眼科杂志编辑部 Aug 7 2017 Ophthalmology
  
  AIM : To evaluate and compare the diagnostic capabilities of peripapillary retinal nerve fiber layer (p-RNFL) parameters of Spectralis optical coherence tomography (OCT) versus Stratus OCT to detect glaucoma in patients with high myopia. METHODS : This is a retrospective, cross-sectional study. Sixty highly myopic eyes of 60 patients were enrolled, with 30 eyes in the glaucoma group and 30 eyes in the control group. All eyes received peripapillary imaging of the ...
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  Mentions: Sun Yat-Sen University Chang Gung University
12. Optical coherence tomography in imaging of peripheral pulmonary arteries
  
  Explore Home Aug 7 2017 Cardiology
  
  Background: To establish an optical coherence tomography (OCT)-based method for imaging peripheral pulmonary arteries. Methods: We recruited eight patients (five men; average age, 4812 years; peripheral pulmonary artery thrombosis, three patients; idiopathic pulmonary hypertension, three patients; interstitial lung disease, two patients) who underwent OCT of the peripheral pulmonary arteries in the First Affiliated Hospital of Guangzhou Medical University and Guangzhou Institute of Respiratory Diseases, between September 2009 and September ...
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  Mentions: Sun Yat-Sen University Wei Wang
13. Contrast improvement for swept source optical coherence tomography image of sub-surface tissue
  
  Explore Conference Proceedings Mar 1 2017
  
  Swept source optical coherence tomography (SSOCT) is an attractive biological imaging technology due to its advantages of simple setup and high imaging speed. As the light intensity attenuated rapidly in high scattering biological tissues, the contrast of OCT image will drop with depth. In this paper a new method was introduced to compensate the attenuation of imaging contrast in SSOCT. The interference signal was divided into two channels of analog ...
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  Mentions: Sun Yat-Sen University Jun Zhang
14. Wide-Field En Face Swept-Source Optical Coherence Tomography Features of Extrafoveal Retinoschisis in Highly Myopic Eyes
  
  Explore IOVS Journal Mar 1 2017 Ophthalmology
  
  Purpose : To evaluate the features of extrafoveal retinoschisis (EFRS) in highly myopic eyes detected by swept-source optical coherence tomography (SS-OCT). Methods : In this retrospective case series, 89 eyes of 65 patients with high myopia and coexisting EFRS were included. The participants underwent a comprehensive ophthalmologic examination, including visual acuity, ocular biometry, refraction, and perimetry. Three-dimensional wide-field scans were obtained with SS-OCT, and en face images were reconstructed with custom software ...
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  Mentions: Sun Yat-Sen University
15. Anterior segment imaging using non-invasive high-resolution optical coherence tomography
  
  Explore Home Feb 22 2017 Ophthalmology
  
  One of the most important developments in the ophthalmology and visual sciences field has been the application of new techniques for imaging the anterior and posterior segment of the eye with non-contact devices. These techniques have been developed quickly considering that are non-invasive and provide high-resolution images of the different parts of the human eye. Definitely, the most spread and used technique for non-contact imaging of the human eye is ...
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  Mentions: Sun Yat-Sen University University of Valencia
16. Noninvasive monitoring of blood glucose concentration in diabetic patients with optical coherence tomography
  
  Explore IOPscience Feb 7 2017
  
  Optical coherence tomography (OCT) has been used to noninvasively monitor the blood glucose concentration (BGC) in healthy subjects with good accuracy and acceptable specificity. Based on this, the paper further considered the possibility of OCT in noninvasive monitoring BGC in diabetic patients. The OCT signal slope (OCTSS) changed with variation of BGC. The correlation coefficient R between BGC and OCTSS in diabetic patients was 0.91; while the correlation coefficient ...
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  Mentions: Sun Yat-Sen University South China Normal University
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