Patents by Inventor John H. Londt

John H. Londt 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).

  • STEP-AND-SHOOT CARDIAC CT IMAGING
    Publication number: 20090141856
    Abstract: The present invention is directed to a method and system of controlling rotation of a gantry to rotate at a rotational speed such that a desired relationship between center projection angles of neighboring partial scans is maintained.
    Type: Application
    Filed: February 16, 2009
    Publication date: June 4, 2009
    Inventors: Jiang Hsieh, Jianying Li, John H. Londt, Melissa Vass, Darin R. Okerlund, Bernice Hoppel
  • Step-and-shoot cardiac CT imaging
    Patent number: 7313215
    Abstract: The present invention is directed to a method and system of controlling rotation of a gantry to rotate at a rotational speed such that a desired relationship between center projection angles of neighboring partial scans is maintained.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: December 25, 2007
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Jianying Li, John H. Londt, Melissa Vass, Darin R. Okerlund, Bernice Hoppel
  • Step-and-shoot cardiac CT imaging
    Patent number: 7313213
    Abstract: A CT imaging system has a rotatable gantry, a table movable fore and aft through an opening defined within the rotatable gantry, and a controller that incrementally moves a subject disposed on the table through a number of discrete data acquisition positions for the acquisition of physiologically gated CT data. The controller also coordinates acquisition of imaging data from the subject at a first data acquisition position within a physiological cycle of the subject and only advances the subject to a next data acquisition position if the imaging data acquired at the first data acquisition position is deemed acceptable. The controller also detects irregularities and physiological motion of the subject and responsive thereto, suspends data acquisition until the irregularity passes, such as, suspending data acquisition until a next cardiac cycle if a heart arrhythmia is detected.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: December 25, 2007
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Jianying Li, John H. Londt, Melissa Vass, Darin R. Okerlund, Bernice Hoppel
  • Method and apparatus for volume scoring calcification concentrations of a CT scan
    Patent number: 7239730
    Abstract: A method for volume scoring a concentration of calcification within a region of interest includes receiving a value for a first calcium lesion volume based on the concentration of calcification within the region of interest, determining an intensity value of the concentration of calcification within the region of interest, calculating the slope of a regression line based on the determined intensity value, and calculating a second calcium lesion volume based on the first calcium lesion volume and the calculated slope of the regression line.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: July 3, 2007
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: John H. Londt, Kishore Acharya
  • METHOD AND APPARATUS FOR VOLUME SCORING CALCIFICATION CONCENTRATIONS OF A CT SCAN
    Publication number: 20040147838
    Abstract: A method for volume scoring a concentration of calcification within a region of interest includes receiving a value for a first calcium lesion volume based on the concentration of calcification within the region of interest, determining an intensity value of the concentration of calcification within the region of interest, calculating the slope of a regression line based on the determined intensity value, and calculating a second calcium lesion volume based on the first calcium lesion volume and the calculated slope of the regression line.
    Type: Application
    Filed: January 29, 2003
    Publication date: July 29, 2004
    Inventors: John H. Londt, Kishore Acharya