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

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1. Mentioned In 41 Articles
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. Microscopic surgery system and navigation method guided by optical coherence tomography (OCT) and automated OCT imaging field calibration
  
  Explore uspto.gov Jul 4 2017 Microscopy , Patents
  
  Provided are a microscopic surgery system and a navigation method guided by optical coherence tomography. The microscopic surgery system may include: an object lens; a surgical microscope unit configured to perform two-dimensional imaging on an area to operate on via the object lens; an optical coherence tomography unit configured to perform two-dimensional tomography imaging on the area via the object lens, with an imaging field calibrated according to that of ...
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  Mentions: Chinese Academy of Sciences
12. Noninvasive chorioretinal imaging in living rabbits using integrated photoacoustic microscopy and optical coherence tomography
  
  Explore OSA | OSA Publishing Jul 1 2017 Ophthalmology
  
  Most reported photoacoustic ocular imaging work to date uses small animals, such as mice and rats, the eyeball sizes of which are less than one-third of those of humans, posing challenges for clinical translation. Here we developed a novel integrated photoacoustic microscopy (PAM) and optical coherence tomography (OCT) system for dual-modality chorioretinal imaging of larger animals, such as rabbits. The system has quantified lateral resolutions of 4.1 m (PAM ...
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  Mentions: University of Michigan Chinese Academy of Sciences Wei Zhang
13. Automatic identification of side branch and main vascular measurements in intravascular optical coherence tomography images
  
  Explore IEEE Xplore Jun 25 2017 Cardiology
  
  Automatic identification of side branch and main vascular measurements in IVOCT images take critical roles in pre-interventional decision making for coronary artery disease treatment. Very little works have been presented on these tasks. In this paper, we proposed a novel side branch identification algorithm which utilizes a newly defined global curvature feature to identify the ostium of side branch. Based on identification results, the main vascular can be segmented automatically ...
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  Mentions: Chinese Academy of Sciences
14. Depth-dependent dispersion compensation for full-depth OCT image
  
  Explore OSA | OSA Publishing Apr 30 2017
  
  A depth-dependent dispersion compensation algorithm for enhancing the image quality of the Fourier-domain optical coherence tomography (OCT) is presented. The dispersion related with depth in the sample is considered. Using the iterative method, an analytical formula for compensating the depth-dependent dispersion in the sample is obtained. We apply depth-dependent dispersion compensation algorithm to process the phantom images andin vivoimages. Using sharpness metric based on variation coefficient to compare the results ...
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  Mentions: Xiangzhao Wang Chinese Academy of Sciences Xiangyang Zhang
15. Machine learning based detection of age-related macular degeneration (AMD) and diabetic macular edema (DME) from optical coherence tomography (OCT) images
  
  Explore OSA | OSA Publishing Nov 9 2016 Ophthalmology
  
  Non-lethal macular diseases greatly impact patients life quality, and will cause vision loss at the late stages. Visual inspection of the optical coherence tomography (OCT) images by the experienced clinicians is the main diagnosis technique. We proposed a computer-aided diagnosis (CAD) model to discriminate age-related macular degeneration (AMD), diabetic macular edema (DME) and healthy macula. The linear configuration pattern (LCP) based features of the OCT images were screened by the ...
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  Mentions: Chinese Academy of Sciences
16. Retroreflective-type Janus microspheres as a novel contrast agent for enhanced optical coherence tomography
  
  Explore Wiley Online Library May 24 2016 Developmental Biology
  
  Working principle and SEM image of Janus microsphere (top). Enhanced OCT imaging (bottom) of Janus microspheres in zebrafish stomach (blue dash line) and sinusoids (green arrows) of nude liver. Optical coherence tomography (OCT) is a well-developed technology that utilizes near-infrared light to reconstruct three-dimensional images of biological tissues with micrometer resolution. Improvements of the imaging contrast of the OCT technique are able to further widen its extensive biomedical applications. In ...
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  Mentions: Chinese Academy of Sciences
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