Patents by Inventor Zhan XIAOHUI

Zhan XIAOHUI 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).

  • Photon counting detector based edge reference detector design and calibration method for small pixelated photon counting CT apparatus
    Patent number: 11779296
    Abstract: An apparatus and a method for correcting for signal variations in pixels of a main photoelectric conversion element in a radiation detection apparatus due to focal spot position drifts. Edge reference detectors are positioned next to a main detector, in a fan beam coverage but outside a scan field of view. The signal variations of the edge reference detectors under an anti-scatter-grid shadow are used to estimate a real-time focal spot movement, which is used to estimate a shadow/signal variation on the main detector that are in the scan field of view.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: October 10, 2023
    Assignee: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Zhan Xiaohui, Qiang Yi, Zhihong Ye
  • PHOTON COUNTING DETECTOR BASED EDGE REFERENCE DETECTOR DESIGN AND CALIBRATION METHOD FOR SMALL PIXELATED PHOTON COUNTING CT
    Publication number: 20210290195
    Abstract: An apparatus and a method for correcting for signal variations in pixels of a main photoelectric conversion element in a radiation detection apparatus due to focal spot position drifts. Edge reference detectors are positioned next to the main detector, in the fan beam coverage but outside the scan field of view. The signal variations of the edge reference detector pixels under the ant-scatter grid shadow are used to estimate the real-time focal spot movement, which is used to estimate the shadow/signal variation on the main detector pixels that are in the scan field of view.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 23, 2021
    Applicant: CANON MEDICAL SYSTEMS CORPORATION
    Inventors: Zhan XIAOHUI, Qiang YI, Zhihong YE