1. Articles from qienyuan zhou

    1-8 of 8
    1. Methods and apparatus for reducing artifacts in OCT angiography using machine learning techniques

      Methods and apparatus for reducing artifacts in OCT angiography using machine learning techniques

      In some embodiments of the present invention, a method of reducing artifacts includes obtaining OCT/OCTA data from an OCT/OCTA imager; preprocessing OCTA/OCT volume data; extracting features from the preprocessed OCTA/OCT volume data; classifying the OCTA/OCT volume data to provide a probability determination data; determining a percentage data from the probability data determination; and reducing artifacts in response to the percentage data.

      Read Full Article
    2. Optical coherence tomography angiography of the peripapillary retina and optic nerve head in dominant optic atrophy

      Optical coherence tomography angiography of the peripapillary retina and optic nerve head in dominant optic atrophy

      Peripapillar and nerve head vessel density (VD) was measured in 10 patients affected by Dominant optic atrophy (DOA) using optical coherence tomography angiography (OCT-A) and compared to the measurements of 15 age- and gender-matched controls. DOA patients showed VD reduction, mostly in the temporal and inferotemporal peripapillary sectors, according to the preferential involvement of the papillomacular bundle. Despite poor best-corrected visual acuity (BCVA), OCT-A revealed good repeatability. VD correlated with functional (mean deviation of visual field and BCVA) and structural (retinal nerve fiber layer thickness) parameters and could be a non-invasive, quantitative tool for the monitoring of the disease and ...

      Read Full Article
    3. Evaluation of Retinal Nerve Fiber Layer Thickness and Ganglion Cell Complex Progression Rates in Healthy, Ocular Hypertensive, and Glaucoma Eyes With the Avanti RTVue-XR Optical Coherence Tomograph Based on 5-Year Follow-up

      Evaluation of Retinal Nerve Fiber Layer Thickness and Ganglion Cell Complex Progression Rates in Healthy, Ocular Hypertensive, and Glaucoma Eyes With the Avanti RTVue-XR Optical Coherence Tomograph Based on 5-Year Follow-up

      Purpose: To determine retinal nerve fiber layer thickness (RNFLT) and ganglion cell complex (GCC) progression rates for healthy eyes and undertreatment ocular hypertensive (OHT) and glaucoma eyes with the Avanti RTVue-XR optical coherence tomography. Materials and Methods: Seventeen healthy subjects (34 eyes), 17 medically treated OHT patients (34 eyes), and 67 medically treated glaucoma patients (122 eyes) were imaged prospectively at 6-month intervals (median follow-up 5.3 y, 11 visits). Results: A minimal negative correlation between baseline RNFLT and RNFLT progression was found in the glaucoma group (r=-0.1708, P=0.0493). In the other groups no correlation between ...

      Read Full Article
    4. RETINAL VASCULAR PERFUSION DENSITY MAPPING USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN NORMALS AND DIABETIC RETINOPATHY PATIENTS

      RETINAL VASCULAR PERFUSION DENSITY MAPPING USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN NORMALS AND DIABETIC RETINOPATHY PATIENTS

      Purpose: To describe a new method of retinal vascular perfusion density mapping using optical coherence tomography angiography and to compare current staging of diabetic retinopathy based on clinical features with a new grading scale based on perifoveal perfusion densities. Methods: A retrospective review was performed on subjects with diabetic retinopathy and age-matched controls imaged with a spectral domain optical coherence tomography system (Optovue XR Avanti, Fremont, CA). Split-spectrum amplitude-decorrelation angiography (SSADA) generated optical coherence tomography angiograms of the superficial retinal capillaries, deep retinal capillaries, and choriocapillaris. Skeletonized optical coherence tomography angiograms were used to create color-coded perfusion maps and capillary ...

      Read Full Article
    5. Scanning and processing using optical coherence tomography

      Scanning and processing using optical coherence tomography

      In accordance with some embodiments, a method of eye examination includes acquiring OCT data with a scan pattern centered on an eye cornea that includes n radial scans repeated r times, c circular scans repeated r times, and n* raster scans where the scan pattern is repeated m times, where each scan includes a A-scans, and where n is an integer that is 0 or greater, r is an integer that is 1 or greater, c is an integer that is 0 or greater, n* is an integer that is 0 or greater, m is an integer that is 1 ...

      Read Full Article
    6. Choroid thickness measurement with RTVue optical coherence tomography in emmetropic eyes, mildly myopic eyes, and highly myopic eyes

      Choroid thickness measurement with RTVue optical coherence tomography in emmetropic eyes, mildly myopic eyes, and highly myopic eyes

      Purpose. To evaluate choroid thickness (CT) with RTVue spectral domain optical coherence tomography (SD-OCT) and the effect of age and myopia in eyes without posterior complications. Methods. In this multicenter cross-sectional study, all enrolled patients were over age 18 and divided them in 3 groups based on refraction: emmetropia (+1 D to –1 D), mild myopia (–1 D to –6 D), and high myopia (–6 D to –20 D) groups. Horizontal scans through the fovea were acquired with RTVue OCT (Optovue Inc., Fremont, California, USA). Choroid thickness was measured at 500 µm intervals up to 1,500 µm temporal and ...

      Read Full Article
    7. Scanning And Processing Using Optical Coherence Tomography

      Scanning And Processing Using Optical Coherence Tomography

      In accordance with some embodiments, a method of eye examination includes acquiring OCT data with a scan pattern centered on an eye cornea that includes n radial scans repeated r times, c circular scans repeated r times, and n* raster scans where the scan pattern is repeated m times, where each scan includes a A-scans, and where n is an integer that is 0 or greater, r is an integer that is 1 or greater, c is an integer that is 0 or greater, n* is an integer that is 0 or greater, m is an integer that is 1 ...

      Read Full Article
    8. System and method for determining birefringence of anterior segment of a patient's eye

      The magnitude and axial orientation of birefringence of the anterior and the posterior segments of the human eye are determined. The anterior segment includes essentially the combined birefringence of the cornea and the crystalline lens, and the posterior segment includes regions at the fundus. The optical axis and the magnitude of the birefringence of the anterior segment is first determined, then the birefringence of the posterior segment is nulled by a variable retarder. The birefringence of the posterior segment is then determined without interference of the birefringence of the anterior segment. The apparatus and method are applicable to the measurement ...
      Read Full Article
    1-8 of 8
  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. Topics in the News

    1. (6 articles) Optovue
    2. (3 articles) Jay Wei
    3. (2 articles) Tony H. Ko
    4. (2 articles) David Huang
    5. (1 articles) San Raffaele Scientfic Institute
    6. (1 articles) Michael R. Hee
    7. (1 articles) Utkarsh Sharma
    8. (1 articles) Gabriel J. Coscas
    9. (1 articles) Francesco Bandello
    10. (1 articles) Carl Zeiss Meditec
    11. (1 articles) South China Normal University
    12. (1 articles) Indiana University
    13. (1 articles) Donald T. Miller
    14. (1 articles) Boston Scientific
    15. (1 articles) Abbot
  3. Popular Articles

  4. Picture Gallery

    Scanning And Processing Using Optical Coherence Tomography Choroid thickness measurement with RTVue optical coherence tomography in emmetropic eyes, mildly myopic eyes, and highly myopic eyes Scanning and processing using optical coherence tomography RETINAL VASCULAR PERFUSION DENSITY MAPPING USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN NORMALS AND DIABETIC RETINOPATHY PATIENTS Evaluation of Retinal Nerve Fiber Layer Thickness and Ganglion Cell Complex Progression Rates in Healthy, Ocular Hypertensive, and Glaucoma Eyes With the Avanti RTVue-XR Optical Coherence Tomograph Based on 5-Year Follow-up Optical coherence tomography angiography of the peripapillary retina and optic nerve head in dominant optic atrophy Methods and apparatus for reducing artifacts in OCT angiography using machine learning techniques Optical coherence tomography angiography (OCTA) findings in Serpiginous Choroiditis Changes in retinal layer thickness with maturation in the dog: an in vivo spectral domain - optical coherence tomography imaging study Optical coherence tomography angiography analysis of fabry disease An unsupervised hierarchical approach for automatic intra‐retinal cyst segmentation in spectral‐domain optical coherence tomography images Towards quantitative assessment of burn based on photoacoustic and optical coherence tomography