Patents by Inventor CHING-HSIAO YU

CHING-HSIAO YU 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).

  • Method of locating center position and axial direction of distal locking hole of intramedullary nail
    Patent number: 10806467
    Abstract: A method of locating locking holes of an intramedullary nail includes taking an X-ray image of an intramedullary nail having two locking holes; connecting centroids of the locking hole contours and an X-ray source to define locking hole vectors and axial directions of the locking holes; calculating a first included angle and normal vector perpendicular to vectors connecting the X-ray source and the locking hole contour centroids; defining a cross product of the locking hole vector and the normal vector as a vector connecting centers of the locking holes, and calculating second and third included angles with the vector connecting the locking hole centers and the vectors connecting the X-ray source to the locking hole contour centroids; and locating the locking holes according to the first, second and third included angles, vectors connecting the X-ray source to the locking hole contour centroids, and a distance between the locking holes.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: October 20, 2020
    Assignee: NATIONAL CENTRAL UNIVERSITY
    Inventors: Ching-Shiow Tseng, Wei-En Hsu, Ching-Hsiao Yu
  • METHOD OF LOCATING CENTER POSITION AND AXIAL DIRECTION OF DISTAL LOCKING HOLE OF INTRAMEDULLARY NAIL
    Publication number: 20170172588
    Abstract: A method of locating locking holes of an intramedullary nail includes taking an X-ray image of an intramedullary nail having two locking holes; connecting centroids of the locking hole contours and an X-ray source to define locking hole vectors and axial directions of the locking holes; calculating a first included angle and normal vector perpendicular to vectors connecting the X-ray source and the locking hole contour centroids; defining a cross product of the locking hole vector and the normal vector as a vector connecting centers of the locking holes, and calculating second and third included angles with the vector connecting the locking hole centers and the vectors connecting the X-ray source to the locking hole contour centroids; and locating the locking holes according to the first, second and third included angles, vectors connecting the X-ray source to the locking hole contour centroids, and a distance between the locking holes.
    Type: Application
    Filed: June 14, 2016
    Publication date: June 22, 2017
    Inventors: CHING-SHIOW TSENG, WEI-EN HSU, CHING-HSIAO YU