Patents by Inventor Kevin B. Parnham

Kevin B. Parnham 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).

  • High-speed pulse discriminating gamma ray camera
    Patent number: 6927396
    Abstract: A gamma ray camera A includes a crystal array S which includes a plurality of pixels 4 each of which outputs a pixel signal in response to receiving a gamma ray. A first circuit (6, 8, 10, 12, 14 and 22) outputs for each pixel 4 of the crystal array S, when a pixel signal output by the pixel 4 has a predetermined relation to a reference signal, a threshold signal related to the position of the pixel 4 in the crystal array S. A second circuit (18, 20, 24, 26, 28, 30 and 32) outputs a counter value for each pixel signal having a predetermined relation to its threshold signal. Lastly, a third circuit 34 accumulates for each pixel 4 of the crystal array S a count of the counter values output by the second circuit (18, 20, 24, 26, 28, 30 and 32) for the pixel 4.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: August 9, 2005
    Assignee: II-VI Incorporated
    Inventors: Viatcheslav Vydrin, Robert K. Davis, Joseph Grosholz, Jr., Kevin B. Parnham
  • High-speed pulse discriminating gamma ray camera
    Publication number: 20040129887
    Abstract: A gamma ray camera A includes a crystal array S which includes a plurality of pixels 4 each of which outputs a pixel signal in response to receiving a gamma ray. A first circuit (6, 8, 10, 12, 14 and 22) outputs for each pixel 4 of the crystal array S, when a pixel signal output by the pixel 4 has a predetermined relation to a reference signal, a threshold signal related to the position of the pixel 4 in the crystal array S. A second circuit (18, 20, 24, 26, 28, 30 and 32) outputs a counter value for each pixel signal having a predetermined relation to its threshold signal. Lastly, a third circuit 34 accumulates for each pixel 4 of the crystal array S a count of the counter values output by the second circuit (18, 20, 24, 26, 28, 30 and 32) for the pixel 4.
    Type: Application
    Filed: August 26, 2003
    Publication date: July 8, 2004
    Inventors: Viatcheslav Vydrin, Robert K. Davis, Joseph Grosholz Jr, Kevin B. Parnham