Articles that mention Chinese Academy of Sciences -Optical Coherence Tomography News

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1. Mentioned In 47 Articles
2. Improved speckle contrast optical coherence tomography angiography
  
  Explore ajtr.org Nov 3 2018
  
  Optical coherence tomography (OCT) is becoming a clinically useful and important imaging technique due to its ability to provide high-resolution structural imaging in vivo. Optical coherence tomography angiography (OCTA) can visualize vasculature imaging of biological tissues. With the advent of Fourier-domain OCT, numerous OCTA techniques have been developed to detect the microvasculature in vivo. The macular region of the fundus is separated into retinal and choroid regions by segmentation algorithm ...
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  Mentions: Chinese Academy of Sciences
3. Deep Learning-Based Detection and Segmentation for BVS Struts in IVOCT Images
  
  Explore Home - Springer Oct 24 2018 Cardiology
  
  Bioresorbable Vascular Scaffold (BVS) is the latest stent type for the treatment of coronary artery disease. A major challenge of BVS is that once it is malapposed during implantation, it may potentially increase the risks of late stent thrombosis. Therefore it is important to analyze struts malapposition during implantation. This paper presents an automatic method for BVS malapposition analysis in intravascular optical coherence tomography images. Struts are firstly detected by ...
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  Mentions: Chinese Academy of Sciences
4. A simple system of swept source optical coherence tomography for a large imaging depth range
  
  Explore ScienceDirect Sep 11 2018
  
  In swept source optical coherence tomography (SSOCT), the imaging depth range sometimes limits its application, such as the whole eye measurement. The methods of extending depth range usually need to redesign the system or add some additional devices. In this paper, we propose a simple system of SSOCT for a large imaging depth range. The system is the same as the original SSOCT with using the swept source clock signal ...
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  Mentions: Osami Sasaki Xiangzhao Wang Chinese Academy of Sciences
5. Optical Coherence Tomography Examination in Myocardial Infarction
  
  Explore Home - ClinicalTrials.gov Jul 20 2018 Cardiology , Clinical Trials
  
  Acute myocardial infarction (AMI), which results from coronary artery occlusion due to thrombosis, remains the leading cause of death and disability worldwide. Pathological studies have demonstrated that plaque rupture accompanied by subsequent thrombus formation is the main mechanism responsible for AMI, accounting for approximately two thirds of cases; the remaining approximately one third of cases are the result of plaque erosion. Moreover, previous studies showed that the risk of cardiovascular ...
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  Mentions: Chinese Academy of Sciences
6. Three-dimensional graph-based skin layer segmentation in optical coherence tomography images for roughness estimation
  
  Explore OSA | OSA Publishing Jul 10 2018 Dermatology
  
  Automatic skin layer segmentation in optical coherence tomography (OCT) images is important for a topographic assessment of skin or skin disease detection. However, existing methods cannot deal with the problem of shadowing in OCT images due to the presence of hair, scales, etc. In this work, we propose a method to segment the topmost layer of the skin (or the skin surface) using 3D graphs with a novel cost function ...
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  Mentions: Chinese Academy of Sciences
7. Optical Coherence Tomography Substudy of A Prospective Multicenter Randomized Post-Market Trial to Assess the Safety and Effectiveness of the Firehawk™ Rapamycin Target Eluting Cobalt Chromium Coronary Stent System for the Treatment of Atherosclerotic Les
  
  Explore eurointervention.org Jun 15 2018 Cardiology
  
  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 ...
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  Mentions: University of London Patrick W. Serruys Chinese Academy of Sciences
8. Automatic analysis of bioresorbable vascular scaffolds in intravascular optical coherence tomography images
  
  Explore OSA | OSA Publishing May 5 2018 Cardiology
  
  The bioresorbable vascular scaffold (BVS) is a new generation of bioresorbable scaffold (BRS) for the treatment of coronary artery disease. A potential challenge of BVS is malapposition, which may possibly lead to late stent thrombosis. It is therefore important to conduct malapposition analysis right after stenting. Since an intravascular optical coherence tomography (IVOCT) image sequence contains thousands of BVS struts, manual analysis is labor intensive and time consuming. Computer-based automatic ...
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  Mentions: Chinese Academy of Sciences Shanghai Jiao Tong University
9. Near-infrared and mid-infrared semiconductor broadband light emitters
  
  Explore Nature Publishing Group Apr 27 2018 Broadband Sources
  
  Semiconductor broadband light emitters have emerged as ideal and vital light sources for a range of biomedical sensing/imaging applications, especially for optical coherence tomography systems. Although near-infrared broadband light emitters have found increasingly wide utilization in these imaging applications, the requirement to simultaneously achieve both a high spectral bandwidth and output power is still challenging for such devices. Owing to the relatively weak amplified spontaneous emission, as a consequence ...
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  Mentions: University of Sheffield Chinese Academy of Sciences Richard A. Hogg
10. Passively Driven Probe Based on Miniaturized Propeller for Intravascular Optical Coherence Tomography
  
  Explore Nature Publishing Group Apr 16 2018 Cardiology , Probes
  
  Optical coherent tomography (OCT) has enabled clinical applications ranging from ophthalmology to cardiology that revolutionized in vivo medical diagnostics in the last few decades, and a variety of endoscopic probes have been developed in order to meet the needs of various endoscopic OCT imaging. We propose a passive driven intravascular optical coherent tomography (IV-OCT) probe in this paper. Instead of using any electrically driven scanning device, the probe makes use ...
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  Mentions: Osami Sasaki Xiangzhao Wang Chinese Academy of Sciences
11. Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes
  
  Explore jove.com Mar 24 2018
  
  Photoacoustic ocular imaging is an emerging ophthalmic imaging technology that can noninvasively visualize ocular tissue by converting light energy into sound waves and is currently under intensive investigation. However, most reported work to date is focused on the imaging of the posterior segment of the eyes of small animals, such as rats and mice, which poses challenges for clinical human translation due to small eyeball sizes. This manuscript describes a ...
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  Mentions: University of Michigan Chinese Academy of Sciences Peking University
12. Evaluation of marginal gap of lithium disilicate glass ceramic crowns with optical coherence tomography
  
  Explore SPIE Digital Library Mar 4 2018 Dentistry
  
  arginal gap (MG) was the most important factor to evaluate the success of crowns. The study was to assess the MG of lithium disilicate glass ceramic crowns with spectral domain optical coherence tomography (OCT) and stereomicroscopy in vitro , and to provide evidence to measure the MG with OCT. Consistency was observed between OCT and stereomicroscopy to measure the MG after cementation. There was no significant difference between the MG of ...
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  Mentions: Capital Medical University Chinese Academy of Sciences Peking University
13. Automatic Lumen Segmentation in Intravascular Optical Coherence Tomography Images Using Level Set
  
  Explore Hindawi Publishing Corporation Jan 4 2018 Cardiology
  
  Automatic lumen segmentation from intravascular optical coherence tomography (IVOCT) images is an important and fundamental work for diagnosis and treatment of coronary artery disease. However, it is a very challenging task due to irregular lumen caused by unstable plaque and bifurcation vessel, guide wire shadow, and blood artifacts. To address these problems, this paper presents a novel automatic level set based segmentation algorithm which is very competent for irregular lumen ...
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  Mentions: Chinese Academy of Sciences Shanghai Jiao Tong University
14. Automatic spectral calibration for polarization-sensitive optical coherence tomography
  
  Explore OSA | OSA Publishing Sep 24 2017
  
  Accurate wavelength assignment is important for Fourier domain polarizationsensitive optical coherence tomography. Incorrect wavelength mapping between the orthogonal horizontal (H) and vertical (V) polarization channels leads to broadening the axial point spread function and generating polarization artifacts. To solve the problem, we propose an automatic spectral calibration method by seeking the optimal calibration coefficient between wavenumber kH and kV. The method first performs a rough calibration to get the relationship ...
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  Mentions: Xiangzhao Wang Chinese Academy of Sciences Zhongliang Li
15. Feature Of The Week 09/10/2017: Thermo-elastic Optical Coherence Tomography
  
  Explore Optical Coherence Tomography News Sep 9 2017
  
  The conventional OCT image contrast is derived from elastic scattering, and shows the internal structure of the sample. The determination of the tissue type in OCT images usually depends on the interpretation by the image reader. More accurate tissue type contrast may be achieved by new OCT-based imaging modalities, with sensitivity to other physical parameters than scattering alone. Phase-sensitive OCT can detect tissue motion on nanometer-to- micrometer length scales using ...
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  Mentions: Robert A. Huber Delft University of Technology Chinese Academy of Sciences
16. Thermo-elastic optical coherence tomography
  
  Explore OSA | OSA Publishing Sep 2 2017
  
  The absorption of nanosecond laser pulses induces rapid thermo-elastic deformation in tissue. A sub-micrometer scale displacement occurs within a few microseconds after the pulse arrival. In this Letter, we investigate the laser-induced thermo-elastic deformation using a 1.5 MHz phase-sensitive optical coherence tomography (OCT) system. A displacement image can be reconstructed, which enables a new modality of phase-sensitive OCT, called thermo-elastic OCT. An analysis of the results shows that the ...
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  Mentions: Robert A. Huber Delft University of Technology Chinese Academy of Sciences
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