1. Tony H. Ko

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    1. Mentioned In 13 Articles

    2. Methods and apparatus for retina blood vessel assessment with OCT angiography

      Methods and apparatus for retina blood vessel assessment with OCT angiography
      A method of processing a 3D OCT dataset is present. A method according to some embodiments of the present invention includes obtaining an OCT data from the 3D OCT dataset; obtaining an OCTA data from the 3D OCT dataset; performing segmentation for at least one boundary on the OCT data; processing the OCTA data in a region of interest to create at least one image representation by assigning a value ...
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    3. 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.
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    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 ...
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    5. Extended range imaging

      Extended range imaging
      An imager that can provide separated images corresponding to differing depths in a sample is presented. In accordance with some embodiments of the invention, an imager can include a light source; a sample arm that receives light from the light source, directs the light to a sample, and captures light returning from the sample; a modulation source that provides different modulations corresponding to differing imaging depths in the sample; a ...
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    6. Enhanced Biometry Using Optical Coherence Tomography

      Enhanced Biometry Using Optical Coherence Tomography
      An imaging method is disclosed. An imaging method according to some embodiments can include obtaining a plurality of measurements of an eye for at least one location by scanning optical radiation across the eye; determining a preferred measurement axis from the plurality of measurements; and processing the plurality of measurements to obtain information of the eye.
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    7. Improved Imaging With REAL-TIME Tracking Using Optical Coherence Tomography

      Improved Imaging With REAL-TIME Tracking Using Optical Coherence Tomography
      An optical coherence tomography system is provided. The system includes an OCT imager; a two-dimensional transverse scanner coupled to the OCT imager, the two-dimensional transverse scanner receiving light from the light source and coupling reflected light from a sample into the OCT imager; optics that couple light between the two-dimensional transverse scanner and the sample; a video camera coupled to the optics and acquiring images of the sample; and a ...
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      Mentions: Optovue Tony H. Ko
    8. Methods and apparatus for optical coherence tomography scanning

      Methods and apparatus for optical coherence tomography scanning
      Optical coherence tomography performs cross-sectional imaging, three-dimensional imaging, or data acquisition in materials or biological tissue by measuring the magnitude and time delay of backscattered or backreflected light from inside the sample. OCT performs imaging or measurement by directing a light beam at the sample, measuring the backscattering or backreflected signal from the sample as a function of the optical delay (known as an axial scan or A-scan), and scanning ...
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    9. Normal Macular Thickness Measurements in Healthy Eyes Using Stratus Optical Coherence Tomography

      Normal Macular Thickness Measurements in Healthy Eyes Using Stratus Optical Coherence Tomography
      ...d values. This discrepancy should be considered when interpreting OCT scans Annie Chan, MD; Jay S. Duker, MD; Tony H. Ko, PhD; James G. Fujimoto, PhD; Joel S. Schuman, MD Arch Ophthalmol. 2006;124:193-198. Objective  To ...
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    10. Methods and apparatus for optical coherence tomography scanning

      Methods and apparatus for optical coherence tomography scanning
      In one aspect, the invention relates to a method of acquiring optical coherence tomographic data from a sample. The method includes the steps of scanning a first location on the sample to obtain a first set of optical coherence tomographic data, scanning a second location on the sample to obtain a second set of optical coherence tomographic data, and defining a fiducial position relative to a location on the sample ...
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    11. Ultrahigh-Resolution Optical Coherence Tomography Using Femtosecond Lasers

      Optical coherence tomography (OCT) is an emerging optical imaging modality for biomedical research and clinical medicine. OCT can perform high resolution, cross-sectional tomographic imaging in materials and biological systems by measuring the echo time delay and magnitude of backreflected or backscattered light [1]. In medical applications, OCT has the advantage that imaging can be performed in situ and in real time, without the need to remove and process specimens as ...
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    12. Enhanced visualization of retinal pathologies with ultrahigh resolution optical coherence tomography (Thesis)

      Enhanced visualization of retinal pathologies with ultrahigh resolution optical coherence tomography (Thesis)
      Current clinical practice calls for the development of techniques to diagnose diseases in its early stages, when treatment is most effective and significant irreversible damage can either be prevented or delayed. Optical coherence tomography (OCT) is an emerging medical diagnostic technology being investigated for applications in a number of medical fields including ophthalmology, cardiology, and gastroenterology. OCT is analogous to ultrasound except that it uses light waves rather than sound ...
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    13. Imaging needle for optical coherence tomography

      Imaging needle for optical coherence tomography
      We describe a miniature optical coherence tomography (OCT) imaging needle that can be inserted into solid tissues and organs to permit interstitial imaging of their internal microstructures with micrometer scale resolution and minimal trauma. A novel rotational coupler with a glass capillary tube is also presented that couples light from a rotating single-mode fiber to a stationary one. A prototype needle with a 27-gauge 410-mm outer diameter has been developed ...
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  2. About Tony H. Ko

    Tony Hong-Tyng Ko was a graduate student at the Harvard University-MIT Division of Health Sciences and Technology.