Patents by Inventor Chandra Pokhrel

Chandra Pokhrel 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).

  • Systems and methods for resetting photoconductive x-ray imaging detectors
    Patent number: 9348038
    Abstract: Systems and methods of resetting a blocking-type photoconductive imaging detector are provided. In one embodiment, after having obtained an image, the imaging detector may be reset by applying a reversed bias potential difference and illuminating the imaging radiation detector with photoexcitation radiation. The photoexcitation radiation has a wavelength selected to excite mobile charges within the photoconductive layer and a spatial intensity profile related to the measured image for neutralizing the trapped charges in a spatially compensated manner. In another embodiment, a photoionizing beam is directed onto an x-ray light valve having a liquid crystal layer in contact with a photoconductive layer.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: May 24, 2016
    Assignee: THUNDER BAY REGIONAL INSTITUTE
    Inventors: John Rowlands, Giovanni Decrescenzo, Chandra Pokhrel, Alla Reznik
  • SYSTEMS AND METHODS FOR RESETTING PHOTOCONDUCTIVE X-RAY IMAGING DETECTORS
    Publication number: 20130221241
    Abstract: Systems and methods of resetting a blocking-type photoconductive imaging detector are provided. In one embodiment, after having obtained an image, the imaging detector may be reset by applying a reversed bias potential difference and illuminating the imaging radiation detector with photoexcitation radiation. The photoexcitation radiation has a wavelength selected to excite mobile charges within the photoconductive layer and a spatial intensity profile related to the measured image for neutralizing the trapped charges in a spatially compensated manner. In another embodiment, a photoionizing beam is directed onto an x-ray light valve having a liquid crystal layer in contact with a photoconductive layer.
    Type: Application
    Filed: September 13, 2011
    Publication date: August 29, 2013
    Applicant: THUNDER BAY REGIONAL RESEARCH INSTITUTE
    Inventors: John Rowlands, Giovanni Decrescenzo, Chandra Pokhrel, Alla Reznik