Articles that mention Nanjing University of Science and Technology -Optical Coherence Tomography News

Nanjing University of Science and Technology

0 Comments Leave a Comment

1-15 of 39 1 2 3 »
1. Mentioned In 39 Articles
2. RETOUCH: The Retinal OCT Fluid Detection and Segmentation Benchmark and Challenge
  
  Explore IEEE Xplore Aug 1 2019 Ophthalmology
  
  Retinal swelling due to the accumulation of fluid is associated with the most vision-threatening retinal diseases. Optical coherence tomography (OCT) is the current standard of care in assessing the presence and quantity of retinal fluid and image-guided treatment management. Deep learning methods have made their impact across medical imaging, and many retinal OCT analysis methods have been proposed. However, it is currently not clear how successful they are in interpreting ...
  Read Full Article
  
  Comment
  
  Mentions: University of Central Florida Simon Fraser University Nanjing University of Science and Technology
3. Image contrast correction method in full-field optical coherence tomography
  
  Explore SPIE Digital Library Jul 16 2019
  
  An image contrast correction method is proposed for en face images obtained with full-field optical coherence tomography (FFOCT). First, the mechanism of image contrast decrease in FFOCT is considered and the theoretical models of main parameters that degrade image contrast are analyzed. Second, changes of contrast with depth are calculated under various conditions, from which the main parameters that affect contrast in tissue are identified. Then based on the analysis ...
  Read Full Article
  
  Comment
  
  Mentions: Wanrong Gao Nanjing University of Science and Technology
4. The Comparison of Morphologic Characteristics of Type 1 and Type 2 Choroidal Neovascularization in Eyes with Neovascular Age-Related Macular Degeneration using Optical Coherence Tomography Angiography
  
  Explore Karger Publishers Jun 24 2019 Ophthalmology
  
  Purpose: The purpose of this study was to use optical coherence tomography angiography (OCTA) to compare the morphology characteristics of type 1 and 2 choroidal neovascularization (CNV) in neovascular age-related macular degeneration (nAMD) patients. Materials and Methods: This is a retrospective, observational study of 51 eyes with nAMD using OCTA from July 2016 through March 2017. Results: In total, 51 eyes of 50 patients were included in the analysis. According ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
5. Diagnostic accuracy of intracoronary optical coherence tomography-derived fractional flow reserve for assessment of coronary stenosis severity
  
  Explore eurointervention.pcronline.com Jun 6 2019 Cardiology
  
  $Diagnostic accuracy of intracoronary optical coherence tomography-derived fractional flow reserve for assessment of coronary stenosis severity$
  ims: A novel method for computation of fractional flow reserve (FFR) from optical coherence tomography (OCT) was developed recently. This study aimed to evaluate the diagnostic accuracy of a new OCT-based FFR (OFR) computational approach, using wire-based FFR as the reference standard. Methods and results: Patients who underwent both OCT and FFR prior to intervention were analysed. The lumen of the interrogated vessel and the ostia of the side branches ...
  Read Full Article
  
  Comment
  
  Mentions: Case Western Reserve University Capital Medical University Shanghai Jiao Tong University
6. OCT angiography-based monitoring of neovascular regression on fibrovascular membrane after preoperative intravitreal conbercept injection
  
  Explore Home - Springer May 9 2019 Ophthalmology
  
  Purpose To quantify the preoperative neovascular change pattern on the fibrovascular membrane (FVM) within 7 days after intravitreal injection of conbercept (IVC) using optical coherence tomography angiography (OCTA) in proliferative diabetic retinopathy (PDR). Methods Prospective, observational study of PDR patients with visible FVM receiving or not receiving IVC. Neovascular changes were assessed by OCTA pre-IVC and 1, 3, 5, and 7 days post-IVC. Vessel skeleton density (SD) and vessel density ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
7. 2D MEMS-based high-speed beam-shifting technique for speckle noise reduction and flow rate measurement in optical coherence tomography
  
  Explore OSA | OSA Publishing Apr 23 2019
  
  In this manuscript, a two-dimensional (2D) micro-electro-mechanical system (MEMS)-based, high-speed beam-shifting spectral domain optical coherence tomography (MHB-SDOCT) is proposed for speckle noise reduction and absolute flow rate measurement. By combining a zigzag scanning protocol, the frame rates of 45.2 Hz for speckle reduction and 25.6 Hz for flow rate measurement are achieved for in-vivo tissue imaging. Phantom experimental results have shown that by setting the incident beam ...
  Read Full Article
  
  Comment
  
  Mentions: University of Toronto Sunnybrook Health Sciences Centre Victor X. D. Yang
8. Measurement and compensation of motion artifacts in spectral domain optical coherence tomography
  
  Explore ScienceDirect Feb 13 2019
  
  Spectral domain optical coherence tomography (SDOCT) has the capability of generating optical sectioning images at high depth resolution in vivo, which is helpful for the diagnosis of various disease. But when the voluntary and involuntary movement of the sample occurs during the acquisition time, the real structure of the sample will be distorted. So it is valuable to compensate the motion artifacts in SDOCT imaging to obtain high quality images ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
9. All single-mode fiber-based polarization-sensitive spectral domain optical coherence tomography system
  
  Explore IOPscience Jan 28 2019
  
  We reported an all single-mode fiber (SMF)-based polarization sensitive spectral domain optical coherence tomography (PSSDOCT) system with single input polarization state (IPS). In our design, polarization state was modulated only by four polarization controllers (PC) and a polarization beam splitter. To extract the phase retardance and optical axis orientation of sample, the Mueller matrix of the fiber system and sample is transferred to a new retardar by employing PCs ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
10. Single-shot wavelength-independent phase-shifting method for full-field optical coherence tomography
  
  Explore OSA | OSA Publishing Jan 18 2019
  
  One limitation of a piezoelectric translator-based phase-shifting method in full-field optical coherence tomography (FF-OCT) is that there exist interference residuals because a light source with broadband is used. In this work, an achromatic phase-shifting method was proposed in which a linear polarizer and a quarter-wave plate were employed to generate the circularly polarized light in the reference arm of a basic Linnik interferometer. The light field reflected from the reference ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
11. Diagnosis and treatment evaluation of in-stent restenosis of carotid artery stenting using optical coherence tomography
  
  Explore Neurology Jan 9 2019 Cardiology , Neurology
  
  A 65-year-old man underwent balloon angioplasty and repeat carotid artery stenting (CAS) due to in-stent restenosis (ISR). Intravascular optical coherence tomography (OCT) showed a severe ISR with fibrotic neointimal growth ( figure 1 ). Post 6.0 30 mm balloon angioplasty, OCT showed intimal disruption and artery dissection ( figure 2 ). After the 8 40 mm stent fully expanded, OCT showed stent struts well apposed, but tissue protrusion from the spaces between stent ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
12. Beam-shifting technique for speckle reduction and flow rate measurement in optical coherence tomography
  
  Explore OSA | OSA Publishing Dec 15 2018
  
  In this Letter, we propose a beam-shifting optical coherence tomography scheme for speckle reduction and blood flow rate calculation, where variations of the speckle pattern and Doppler angle were generated by parallel shifting of the sample beam incident on the objective lens. The resultant optical coherent tomography images could then be averaged for speckle noise reduction and simultaneously analyzed for flow rate measurement. The performance of the proposed technique was ...
  Read Full Article
  
  Comment
  
  Mentions: University of Toronto Sunnybrook Health Sciences Centre Victor X. D. Yang
13. Buffer-averaging super-continuum source based spectral domain optical coherence tomography for high speed imaging
  
  Explore OSA | OSA Publishing Nov 29 2018 Ophthalmology
  
  In super-continuum (SC) source based spectral domain optical coherence tomography (SC-SDOCT), the stability of the power spectral density (PSD) has a significant impact on OCT system sensitivity and image signal to noise ratio (SNR). High speed imaging decreases the camera's exposure time, thus each A-scan contained fewer laser pulse excited SC wideband emissions, resulting in a decrease of SNR. In this manuscript, we present a buffer-averaging SC-SDOCT (BASC-SDOCT) to ...
  Read Full Article
  
  Comment
  
  Mentions: University of Toronto Sunnybrook Health Sciences Centre Victor X. D. Yang
14. Automated segmentation of hyperreflective foci in spectral domain optical coherence tomography with diabetic retinopathy
  
  Explore SPIE Digital Library Feb 10 2018 Ophthalmology
  
  We propose an automated segmentation method to detect, segment, and quantify hyperreflective foci (HFs) in three-dimensional (3-D) spectral domain optical coherence tomography (SD-OCT). The algorithm is divided into three stages: preprocessing, layer segmentation, and HF segmentation. In this paper, a supervised classifier (random forest) was used to produce the set of boundary probabilities in which an optimal graph search method was then applied to identify and produce the layer segmentation ...
  Read Full Article
  
  Comment
  
  Mentions: Nanjing University of Science and Technology
15. Automatic Subretinal Fluid Segmentation of Retinal SD-OCT Images With Neurosensory Retinal Detachment Guided by Enface Fundus Imaging
  
  Explore IEEE Xplore Dec 22 2017 Ophthalmology
  
  Objective: Accurate segmentation of neurosensory retinal detachment (NRD) associated subretinal fluid in spectral domain optical coherence tomography (SD-OCT) is vital for the assessment of central serous chorioretinopathy (CSC). A novel two-stage segmentation algorithm was proposed, guided by Enface fundus imaging. Methods: In the first stage, Enface fundus image was segmented using thickness map prior to detecting the fluid-associated abnormalities with diffuse boundaries. In the second stage, the locations of the ...
  Read Full Article
  
  Comment
  
  Mentions: Sungkyunkwan University Nanjing University of Science and Technology
16. Quantitative measurement of subsurface damage with self-referenced spectral domain optical coherence tomography
  
  Explore OSA | OSA Publishing Oct 22 2017 NDE/NDT
  
  In this work, we present the three-dimensional reconstruction of the subsurface damage (SSD) within the optical components at the level of several microns with a self-referenced spectral domain optical coherence tomography (SDOCT) system, from which the quantitative information, including the maximum depth, the cluster depth, the shape, the size and the damage density, can be acquired. First, to compare the actual maximum depths with the ones computed by the formulas ...
  Read Full Article
  
  Comment
  
  Mentions: Wanrong Gao Nanjing University of Science and Technology
17. 1-15 of 39 1 2 3 »