1. Chinese Academy of Sciences

    0 Comments Leave a Comment

    1-15 of 127 1 2 3 4 5 6 7 8 9 »
    1. Mentioned In 127 Articles

    2. IMPACT OF PENETRATION AND IMAGE ANALYSIS IN OPTICAL COHERENCE TOMOGRAPHY ON THE MEASUREMENT OF CHOROIDAL VASCULARITY PARAMETERS

      IMPACT OF PENETRATION AND IMAGE ANALYSIS IN OPTICAL COHERENCE TOMOGRAPHY ON THE MEASUREMENT OF CHOROIDAL VASCULARITY PARAMETERS
      Purpose: To investigate the impact of penetration and image analysis in different optical coherence tomography (OCT) instruments on the measurement of choroidal vascularity parameters. Methods: Twenty-three healthy volunteers were imaged using two swept-source OCTs and one spectral-domain OCT. A fully automatic segmentation method based on ResNet-UNet and Niblack local threshold binarization was performed to quantify the relevant choroidal vascular parameters, including choroidal vascularity index, total choroidal volume, and luminal volume ...
      Read Full Article
    3. Optical coherence tomography imaging evidence of thrombus inside the tunnel of Patent Foramen Ovale

      Optical coherence tomography imaging evidence of thrombus inside the tunnel of Patent Foramen Ovale
      A 31-year-old male with a history of multiple cerebral infarctions ( Panel A ) attributed to patent foreman ovale (PFO) was admitted to our hospital for percutaneous closure of PFO confirmed by transoesophageal echocardiography (TEE). Transoesophageal echocardiography showed a large size (2 mm), long tunnel (10 mm) PFO and a 1.5 mm3 mm low echo area suspected of thrombus in the tunnel ( Panel B ). Contrast TEE revealed the presence of a ...
      Read Full Article
    4. Retinal Structure Detection in OCTA Image via Voting-based Multi-task Learning

      Retinal Structure Detection in OCTA Image via Voting-based Multi-task Learning
      Automated detection of retinal structures, such as retinal vessels (RV), the foveal avascular zone (FAZ), and retinal vascular junctions (RVJ), are of great importance for understanding diseases of the eye and clinical decision-making. In this paper, we propose a novel Voting-based Adaptive Feature Fusion multi-task network (VAFF-Net) for joint segmentation, detection, and classification of RV, FAZ, and RVJ in optical coherence tomography angiography (OCTA). A task-specific voting gate module is ...
      Read Full Article
    5. Optical coherence tomography angiography in retinitis pigmentosa: A narrative review

      Optical coherence tomography angiography in retinitis pigmentosa: A narrative review
      Retinitis pigmentosa (RP) is a group of inherited retinal disorders characterized by progressive rod and cone photoreceptor degeneration. Changes in retinal vasculature have long been associated with RP. Optical coherence tomography angiography (OCTA) is a novel imaging technology that enables noninvasive visualization of the retinal and choroidal microvasculature. OCTA enables quantification of microvascular changes in the retinal capillary plexus and choriocapillaris, in addition to qualitative feature description. Therefore, OCTA has ...
      Read Full Article
    6. Perivascular Flower-Bud-like Lesions on En Face Optical Coherence Tomography Angiography in Patients with Vitreoretinal Lymphoma

      Perivascular Flower-Bud-like Lesions on En Face Optical Coherence Tomography Angiography in Patients with Vitreoretinal Lymphoma
      Purpose: To describe perivascular flower-bud-like lesions (PFBLs) as novel characteristics of vitreoretinal lymphoma (VRL) on en face optical coherence tomography (OCT) angiography (OCTA). Methods: A retrospective chart review was performed on 23 consecutive patients (35 eyes), who had biopsy-proven VRL between January 2018 and March 2021. En face OCTA images were analyzed before and after intervention. PFBLs were initially identified on mid-retinal slabs of en face OCTA, and were further ...
      Read Full Article
    7. Sparse-based Domain Adaptation Network for OCTA Image Super-Resolution Reconstruction

      Sparse-based Domain Adaptation Network for OCTA Image Super-Resolution Reconstruction
      Retinal Optical Coherence Tomography Angiography (OCTA) with high-resolution is important for the quantification and analysis of retinal vasculature. However, the resolution of OCTA images is inversely proportional to the field of view at the same sampling frequency, which is not conducive to clinicians for analyzing larger vascular areas. In this paper, we propose a novel Sparse-based domain Adaptation Super-Resolution network (SASR) for the reconstruction of realistic 6 6 m m ...
      Read Full Article
    8. Clinical Outcomes Following Hemodynamic Parameter or Intravascular Imaging-Guided Percutaneous Coronary Intervention in the Era of Drug-Eluting Stents: An Updated Systematic Review and Bayesian Network Meta-Analysis of 28 Randomized Trials and 11,860 Pati

      Clinical Outcomes Following Hemodynamic Parameter or Intravascular Imaging-Guided Percutaneous Coronary Intervention in the Era of Drug-Eluting Stents: An Updated Systematic Review and Bayesian Network Meta-Analysis of 28 Randomized Trials and 11,860 Pati
      Background: Coronary angiography (CAG) is the standard imaging modality for guiding percutaneous coronary interventions (PCI). Intracoronary imaging techniques such as intravascular ultrasound (IVUS) and optical coherence tomography (OCT), and hemodynamic parameter like fractional flow reserve (FFR) can overcome some limitations of CAG. Objective: We sought to explore the clinical outcomes of different PCI guidance modalities in the era of drug-eluting stent (DES). Methods: A network meta-analysis of 28 randomized trials ...
      Read Full Article
    9. Predicting lesion shrinkage in eyes with myopic choroidal neovascularization from features on optical coherence tomography angiography

      Predicting lesion shrinkage in eyes with myopic choroidal neovascularization from features on optical coherence tomography angiography
      Purpose: To identify baseline morphological predictors of lesion shrinkage in eyes with myopic choroidal neovascularization (mCNV) treated with anti-vascular endothelial growth factor (VEGF). Methods: This retrospective study included 46 eyes (41 consecutive patients) with active mCNV receiving anti-VEGF treatment. Optical coherence tomography angiography (OCTA) was performed at baseline and 1 year after treatment. Quantitative features were obtained from OCTA images using AngioTool software. Eyes were classified as "high-shrinkage" or "low-shrinkage ...
      Read Full Article
    10. High-Risk Culprit Plaque Predicts Cardiovascular Outcomes Independently of Plaque Rupture in ST-Segment Elevation Myocardial Infarction: Insight From Optical Coherence Tomography

      High-Risk Culprit Plaque Predicts Cardiovascular Outcomes Independently of Plaque Rupture in ST-Segment Elevation Myocardial Infarction: Insight From Optical Coherence Tomography
      The present study explored the predictive value of culprit high-risk plaque (HRP) detected by optical coherence tomography (OCT) for predicting major adverse cardiovascular events (MACEs) in patients with ST-segment elevation myocardial infarction (STEMI). HRP was defined as the simultaneous presence of four criteria: minimum lumen area 3.5 mm 2 , fibrous cap thickness 75 m, lipid plaque with lipid arc extension 180, and presence of macrophages. Patients (n = 274) were ...
      Read Full Article
    11. Quantitative evaluation of retinal and choroidal vascularity and retrobulbar blood flow in patients with myopic anisometropia by CDI and OCTA

      Quantitative evaluation of retinal and choroidal vascularity and retrobulbar blood flow in patients with myopic anisometropia by CDI and OCTA
      Aims To investigate the association between the myopic severity and retinal microvascular density, choroidal vascularity and retrobulbar blood flow in adult anisomyopes. Methods This study comprised 90 eyes of 45 myopic anisomyopes who were recruited for Colour Doppler imaging (CDI) and optical coherence tomography angiography (OCTA). The superficial vessel density (SVD), deep vessel density (DVD), choroidal thickness (ChT) and choroidal vascularity, including total choroidal area (TCA), luminal area (LA), stromal ...
      Read Full Article
    12. Esophageal optical coherence tomography image synthesis using an adversarially learned variational autoencoder

      Esophageal optical coherence tomography image synthesis using an adversarially learned variational autoencoder
      Endoscopic optical coherence tomography (OCT) imaging offers a non-invasive way to detect esophageal lesions on the microscopic scale, which is of clinical potential in the early diagnosis and treatment of esophageal cancers. Recent studies focused on applying deep learning-based methods in esophageal OCT image analysis and achieved promising results, which require a large data size. However, traditional data augmentation techniques generate samples that are highly correlated and sometimes far from ...
      Read Full Article
    13. In vivo evaluation of endometrium through dual-modality intrauterine endoscopy

      In vivo evaluation of endometrium through dual-modality intrauterine endoscopy
      Female infertilities are highly associated with poor endometrial receptivity. A receptive endometrium is generally characterized by the normal uterine cavity, intact endometrial surface, appropriate endometrial thickness, and echo pattern. Acquiring comprehensive structural information is the prerequisite of endometrium assessment, which is beyond the ability of any single-modality imaging method. In this paper, we introduce a custom-made intrauterine dual-modality (OCT/ultrasound) endoscopic imaging system and achieve in vivo imaging of rabbit ...
      Read Full Article
    14. Development and quantitative assessment of deep learning-based image enhancement for optical coherence tomography

      Development and quantitative assessment of deep learning-based image enhancement for optical coherence tomography
      Purpose: To develop a deep learning-based framework to improve the image quality of optical coherence tomography (OCT) and evaluate its image enhancement effect with the traditional image averaging method from a clinical perspective. Methods: 359 normal eyes and 456 eyes with various retinal conditions were included. A deep learning framework with high-resolution representation was developed to achieve image quality enhancement for OCT images. The quantitative comparisons, including expert subjective scores ...
      Read Full Article
    15. Application of Keratograph and Fourier-Domain Optical Coherence Tomography in Measurements of Tear Meniscus Height

      Application of Keratograph and Fourier-Domain Optical Coherence Tomography in Measurements of Tear Meniscus Height
      To compare the interoperator repeatability of tear meniscus height (TMH) measurements obtained with a keratograph and Fourier-domain optical coherence tomography (FD-OCT) and to assess the agreement between the methods.Forty-seven eyes with DED and 41 healthy eyes were analyzed using the Schirmer test I and tear breakup time test (TBUT). The TMH was measured three times with each device. The repeatability of measurements was assessed by within-subject standard deviation (Sw ...
      Read Full Article
    16. Comparison of a New Optical Biometer That Combines Scheimpflug Imaging With Partial Coherence Interferometry With That of an Optical Biometer Based on Swept-Source Optical Coherence Tomography and Placido-Disk Topography

      Comparison of a New Optical Biometer That Combines Scheimpflug Imaging With Partial Coherence Interferometry With That of an Optical Biometer Based on Swept-Source Optical Coherence Tomography and Placido-Disk Topography
      Purpose: To evaluate measurement precision and to compare the Pentacam AXL (Oculus Optikgerte, Wetzlar, German), a new optical biometer based on Scheimpflug imaging and partial coherence interferometry (PCI) with that of the OA-2000 biometer (Tomey, Nagoya, Japan), which combines swept-source optical coherence tomography (SS-OCT) and Placido-disk topography. Methods: Axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AQD), mean keratometry (Km), astigmatism vectors J0, J45, and ...
      Read Full Article
    17. 1-15 of 127 1 2 3 4 5 6 7 8 9 »
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. About Chinese Academy of Sciences

    Chinese Academy of Sciences

    Chinese Academy of Sciences (CAS) is a leading academic institution and comprehensive research and development center in natural science, technological science and high-tech innovation in China. It was founded in Beijing on 1st November 1949 on the basis of the former Academia Sinica (Central Academy of Sciences) and Peiping Academy of Sciences.