Patents by Inventor Johan Jakob Axelsson

Johan Jakob Axelsson 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).

  • Cherenkov imaging systems and methods to monitor beam profiles and radiation dose while avoiding interference from room lighting
    Patent number: 10940332
    Abstract: A monitor for pulsed high energy radiation therapy using a radiation beam passing through a treatment zone, the radiation of 0.2 MEV or greater; has a camera for imaging Cherenkov light from the treatment zone; apparatus for preventing interference by room lighting, the camera synchronized to pulses of the radiation beam; and an image processor adapted to determine extent of the beam area on the patient skin from the images. Additionally an image processor determines cumulative skin dose in the treatment zone from the images. In embodiments, the processor uses a three-dimensional model of a subject to determine mapping of image intensity in images of Cherenkov light to radiation intensity in skin, applies the mapping to images of Cherenkov light to verify skin dose delivered, and accumulates skin dose by summing the maps of skin dose.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: March 9, 2021
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: Rongxiao Zhang, Brian William Pogue, Adam K. Glaser, David J. Gladstone, Lesley A. Jarvis, Jacqueline M. Andreozzi, Shudong Jiang, Scott Christian Davis, Johan Jakob Axelsson
  • CHERENKOV IMAGING SYSTEMS AND METHODS TO MONITOR BEAM PROFILES AND RADIATION DOSE WHILE AVOIDING INTERFERENCE FROM ROOM LIGHTING
    Publication number: 20160263402
    Abstract: A monitor for pulsed high energy radiation therapy using a radiation beam passing through a treatment zone, the radiation of 0.2 MEV or greater; has a camera for imaging Cherenkov light from the treatment zone; apparatus for preventing interference by room lighting, the camera synchronized to pulses of the radiation beam; and an image processor adapted to determine extent of the beam area on the patient skin from the images. Additionally an image processor determines cumulative skin dose in the treatment zone from the images. In embodiments, the processor uses a three-dimensional model of a subject to determine mapping of image intensity in images of Cherenkov light to radiation intensity in skin, applies the mapping to images of Cherenkov light to verify skin dose delivered, and accumulates skin dose by summing the maps of skin dose.
    Type: Application
    Filed: May 20, 2016
    Publication date: September 15, 2016
    Inventors: Rongxiao Zhang, Brian William Pogue, Adam K. Glaser, David J. Gladstone, Lesley A. Jarvis, Jacqueline M. Andreozzi, Shudong Jiang, Scott Christian Davis, Johan Jakob Axelsson