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

Nanjing University of Science and Technology

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1. Mentioned In 44 Articles
2. FFOCT imaging based on compressed sensing
  
  Explore IOPscience Jan 9 2020
  
  With the demand for high-resolution images, the storage space occupied by the images of the full-field optical coherence tomography (FFOCT) system is becoming more and more intensified. How to reduce the data volume of high-resolution image systems has become a research hotspot in the image processing industry. In particular, precision medicine requires high-resolution images of organs and tissues, and this data storage system requires a large storage space. For this ...
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  Mentions: Nanjing University of Science and Technology
3. Cholesterol Crystals are Associated with Carotid Plaque Vulnerability: An Optical Coherence Tomography Study
  
  Explore ScienceDirect Dec 19 2019 Cardiology
  
  Objective: Vulnerable carotid plaque is associated with cerebrovascular events. Cholesterol crystals are often seen in the atherosclerotic plaques. However, the potential role of cholesterol crystals in carotid plaques destabilization is unknown. We aimed to identify the association between cholesterol crystals and carotid plaque vulnerability. Methods: Optical coherence tomography assessment of carotid plaque was performed in 95 patients. Clinical characteristics and plaque morphology were examined. The differences in plaque characteristics (thrombus ...
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  Mentions: Nanjing University of Science and Technology
4. Gabor optical coherence tomographic angiography (GOCTA) (Part II): theoretical basis of sensitivity improvement and optimization for processing speed
  
  Explore OSA | OSA Publishing Dec 13 2019
  
  We previously proposed a Gabor optical coherence tomography angiography (GOCTA) algorithm for spectral domain optical coherence tomography (SDOCT) to extract microvascular signals from spectral fringes directly, with speed improvement of 4 to 20 times over existing methods. In this manuscript, we explored the theoretical basis of GOCTA with comparison of experimental data using solid and liquid displacement sample targets, demonstrating that the majority of the GOCTA sensitivity advantage over speckle ...
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  Mentions: University of Toronto Sunnybrook Health Sciences Centre Victor X. D. Yang
5. Extended focus optical coherence tomography with Fresnel lens
  
  Explore Home - Springer Nov 12 2019
  
  We report a Fresnel lens based spectral domain optical coherence tomography (SDOCT) setup to overcome the trade-off between lateral resolution and focusing depth which is one of the main problems for OCT system. We demonstrated the feasibility of the Fresnel lens based SDOCT system by measuring the lateral resolution at different depth positions and compared these results with that obtained by conventional SDOCT illuminated with a light source of a ...
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6. Geographic Atrophy Segmentation in SD-OCT Images Using Synthesized Fundus Autofluorescence Imaging
  
  Explore ScienceDirect Oct 4 2019 Ophthalmology
  
  Background and Objective Accurate assessment of geographic atrophy (GA) is critical for diagnosis and therapy of non-exudative age-related macular degeneration (AMD). Herein, we propose a novel GA segmentation framework for spectral-domain optical coherence tomography (SD-OCT) images that employs synthesized fundus autofluorescence (FAF) images. Methods An en-face OCT image is created via the restricted sub-volume projection of three-dimensional OCT data. A GA region-aware conditional generative adversarial network is employed to generate ...
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  Mentions: Stanford University Sungkyunkwan University Nanjing University of Science and Technology
7. 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 ...
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  Mentions: University of Central Florida Simon Fraser University Nanjing University of Science and Technology
8. 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 ...
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  Mentions: Wanrong Gao Nanjing University of Science and Technology
9. 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 ...
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  Mentions: Nanjing University of Science and Technology
10. 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 ...
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  Mentions: Case Western Reserve University Capital Medical University Shanghai Jiao Tong University
11. 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 ...
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  Mentions: Nanjing University of Science and Technology
12. 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 ...
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  Mentions: University of Toronto Sunnybrook Health Sciences Centre Victor X. D. Yang
13. 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 ...
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14. 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 ...
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15. 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 ...
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16. 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 ...
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