Patents by Inventor Ka Long KO

Ka Long KO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods and apparatuses for quantifying vascular fluid motions from DSA
    Patent number: 10499870
    Abstract: Disclosed is a method and an apparatus for quantifying vascular fluid motions from digital subtraction angiography (DSA) images, comprising: calculating an optical flow field between two temporal consecutive DSA images; and estimating a displacement of blood or tissue between the two temporal consecutive DSA images from the calculated optical flow field, wherein the optical flow field is calculated by solving a minimization problem of a CLG energy function, wherein the CLG energy function combines the temporally extended variant of Horn-Schunck approach with Lucas-Kanade approach non-linearly in spatiotemporal approach. The present disclosure provides a new optical flow solution significantly reducing the computation cost with a high robustness for quantifying vascular fluid motions from DSA.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: December 10, 2019
    Assignee: The Chinese University of Hong Kong
    Inventors: Defeng Wang, Ka Long Ko
  • METHODS AND APPARATUSES FOR QUANTIFYING VASCULAR FLUID MOTIONS FROM DSA
    Publication number: 20180333120
    Abstract: Disclosed are a method and an apparatus for quantifying vascular fluid motions from digital subtraction angiography (DSA) images, comprising: calculating an optical flow field between two temporal consecutive DSA images; and estimating a displacement of blood or tissue between the two temporal consecutive DSA images from the calculated optical flow field, wherein the optical flow field is calculated by solving a minimization problem of a CLG energy function, wherein the CLG energy function combines the temporally extended variant of Horn-Schunck approach with Lucas-Kanade approach non-linearly in spatiotemporal approach. The present disclosure provides a new optical flow solution significantly reducing the computation cost with a high robustness for quantifying vascular fluid motions from DSA.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 22, 2018
    Inventors: Defeng WANG, Ka Long KO
  • METHODS AND APPARATUSES FOR QUANTIFYING VASCULAR FLUID MOTIONS FROM DSA
    Publication number: 20180333123
    Abstract: Disclosed is a method and an apparatus for quantifying vascular fluid motions from digital subtraction angiography (DSA) images, comprising: calculating an optical flow field between two temporal consecutive DSA images; and estimating a displacement of blood or tissue between the two temporal consecutive DSA images from the calculated optical flow field, wherein the optical flow field is calculated by solving a minimization problem of a CLG energy function, wherein the CLG energy function combines the temporally extended variant of Horn-Schunck approach with Lucas-Kanade approach non-linearly in spatiotemporal approach. The present disclosure provides a new optical flow solution significantly reducing the computation cost with a high robustness for quantifying vascular fluid motions from DSA.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 22, 2018
    Inventors: Defeng WANG, Ka Long KO