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

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1. Mentioned In 34 Articles
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. Nondestructive Analysis of Jingdezhen and Longquan Celadon Wares Excavated from Nanhai No.1 Shipwreck
  
  Explore gpxygpfx.com May 9 2016 NDE/NDT
  
  The provenance study of ancient ceramics, as an important part in archaeological field, is the researching focus for researchers in scientific and technological archaeology. At present, the provenance study of ancient ceramics mainly depends on chemical analysis technologies while non-destructive physical structural analysis of ceramic glaze is relatively lacking. Therefore, it is difficult to have a comprehensive understanding of ancient ceramics. Optical coherence tomography (OCT) is an emerging non-destructive imaging ...
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  Mentions: Chinese Academy of Sciences
11. Speckle Reduction in 3D Optical Coherence Tomography of Retina by A-Scan Reconstruction
  
  Explore IEEE Xplore Apr 27 2016 Ophthalmology
  
  Optical coherence tomography (OCT) is a micrometer-scale, cross-sectional imaging modality for biological tissue. It has been widely used for retinal imaging in ophthalmology. Speckle noise is problematic in OCT. A raw OCT image/volume usually has very poor image quality due to speckle noise, which often obscures the retinal structures. Overlapping scan is often used for speckle reduction in a 2D line-scan. However, it leads to an increase of the ...
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  Mentions: Topcon Medical Systems Masahiro Akiba Chinese Academy of Sciences
12. Pseudophakic Malignant Glaucoma Treatment Assisted with Anterior Segment Optical Coherence Tomography: A Case Report
  
  Explore Apache Tomcat/8.0.21 Mar 11 2016 Ophthalmology
  
  No abstract provided.
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  Mentions: Chinese Academy of Sciences
13. Feature Of The Week 12/06/2015: Heartbeat Optical Coherence Tomography
  
  Explore Optical Coherence Tomography News Dec 5 2015 Cardiology
  
  Intravascular optical coherence tomography (IV-OCT) has gained widespread use over the past few years, offering highly detailed images of the coronary artery pathologies and interventions. In contrast to the cross-sectional view, longitudinal sections and three-dimensional (3D) renderings are affected by cardiac motion artifacts and undersampling, complicating interpretation and measurements. We developed Heartbeat OCT, a new OCT method that overcomes these issues. This study aims to demonstrate in vivo Heartbeat OCT ...
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  Mentions: Robert A. Huber Evelyn Regar Delft University of Technology
14. Heartbeat OCT: in vivo intravascular megahertz-optical coherence tomography
  
  Explore OSA | OSA Publishing Nov 23 2015
  
  Cardiac motion artifacts, non-uniform rotational distortion and undersampling affect the image quality and the diagnostic impact of intravascular optical coherence tomography (IV-OCT). In this study we demonstrate how these limitations of IV-OCT can be addressed by using an imaging system that we called Heartbeat OCT, combining a fast Fourier Domain Mode Locked laser, fast pullback, and a micromotor actuated catheter, designed to examine a coronary vessel in less than one ...
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  Mentions: Robert A. Huber Evelyn Regar Delft University of Technology
15. A morphological study of the foveal avascular zone in patients with diabetes mellitus using optical coherence tomography angiography
  
  Explore Home - Springer Sep 9 2015 Ophthalmology
  
  Purpose To investigate the area and radius of the foveal avascular zone (FAZ) in patients with diabetes mellitus (DM) using optical coherence tomography (OCT) angiography. Methods Sixty-five patients with DM (113 eyes) and 62 healthy controls (85 eyes) were included in the study. All of the participants underwent examination with OCT angiography. The vertical radius (VR), horizontal radius (HR) and area of the FAZ were measured. Results The differences in ...
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  Mentions: Chinese Academy of Sciences
16. A Micromotor Catheter for Intravascular Optical Coherence Tomography
  
  Explore engineering.org.cn Jul 14 2015 Cardiology , Probes
  
  We have developed a new form of intravascular optical coherence tomography (IV-OCT) that allows the extremely fast acquisition of high-resolution images of the coronary arteries. This process leads to much better image quality by eliminating cardiac motion artefacts and undersampling. It relies on a catheter that incorporates a synchronous micromotor with a diameter of 1.0 mm and a rotational speed of up to 5600 revolutions per second, enabling an ...
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  Mentions: Delft University of Technology Chinese Academy of Sciences Gijs van Soest
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