Patents by Inventor Shankar Visranathan Guru

Shankar Visranathan Guru 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).

  • Apparatus and method for calibrating gamma cameras
    Patent number: 6452164
    Abstract: An apparatus and method used to calibrate a gamma camera include an energy source and intensity selector and an energy weighting device. The energy source provides an energy output, such as an electrical current. The intensity selector is connected to the energy source and adjusts the energy output to a predetermined energy level that corresponds to an intensity of a predetermined radioactive source. The energy weighting device is also connected to the energy source and gamma camera, and the spatial compensator creates calibration signals from the energy output of the energy source. The calibration signals are supplied to the gamma camera and used during calibration of the gamma camera in lieu of energy signals produced by the gamma camera in response to a radioactive source.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: September 17, 2002
    Assignee: General Electric Company
    Inventors: Emad Andarawis Andarawis, Paul Andrew Frank, Shankar Visranathan Guru, Ahmad Nadeem Ishaque, Douglas Ray Powell