Patents by Inventor Herbert K. Koehl

Herbert K. Koehl 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).

  • Modulation of X-ray tube current during CT scanning
    Patent number: 5485494
    Abstract: An x-ray CT system modulates x-ray tube current as a function of gantry angle to reduce the total patient dose without significantly increasing image noise. A modulation waveform is stored in a table as a function of gantry angle, and during a slice acquisition, values are periodically read from this table and employed to calculate tube current commands. Tube current is monitored and compared with the latest command to ensure the proper x-ray dose is applied.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: January 16, 1996
    Assignee: General Electric Company
    Inventors: Kenneth R. Williams, Herbert K. Koehl, Jonathan R. Schmidt