Patents by Inventor Geordie Henry Zapalac

Geordie Henry Zapalac 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).

  • Methods and apparatus for motion compensation in image reconstruction
    Patent number: 6934357
    Abstract: A method for facilitating a reduction in motion artifacts includes comparing two sequential scanned images to determine motion.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: August 23, 2005
    Assignee: GE Medical Systems Global Technology Company LLC
    Inventors: Douglas Perry Boyd, Geordie Henry Zapalac, Peter Michael Edic
  • Method and apparatus for connecting temporally separated sinograms in an EBT scanner
    Patent number: 6842499
    Abstract: A method and apparatus are disclosed in an EBT scanner for generating an image from a data set collected from a subject beginning at an arbitrary time within a scanning time interval. A sequence of temporally separated, unfolded parallel view sinograms are generated corresponding to scans through the subject during the scanning time interval. Data from each of the sinograms are folded into each other such that loss of information and image artifacts, caused by temporal separation between temporally adjacent sinograms, are greatly reduced. An image is generated from a subset of data taken from the folded sinograms wherein the subset of data begins at an arbitrary time within the scanning time interval.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: January 11, 2005
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Geordie Henry Zapalac
  • Method and apparatus for scatter measurement using an occluded detector ring
    Patent number: 6789943
    Abstract: Certain embodiments include a system and method for scatter measurement and correction. The method includes performing a calibration scan using a phantom to measure a scatter signal ratio between scatter x-rays impacting a first detector ring and scatter x-rays impacting a second detector ring. The scatter signal ratio is used to determine a scatter scale factor. The method further includes positioning a collimator such that the first detector ring is occluded from a path of primary x-rays generated by a target. The method also includes executing a low exposure scan to obtain x-ray scatter data using the first detector ring and the second detector ring and applying the scatter scale factor to the scatter data to produce scaled scatter data. The method further includes obtaining image data using the first detector ring and/or the said second detector ring and adjusting the image data using the scaled scatter data.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: September 14, 2004
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Geordie Henry Zapalac
  • Methods and apparatus for motion compensation in image reconstruction
    Publication number: 20040136501
    Abstract: A method for facilitating a reduction in motion artifacts includes comparing two sequential scanned images to determine motion.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 15, 2004
    Inventors: Douglas Perry Boyd, Geordie Henry Zapalac, Peter Michael Edic
  • Method and apparatus for connecting temporally separated sinograms in an EBT scanner
    Publication number: 20040096027
    Abstract: A method and apparatus are disclosed in an EBT scanner for generating an image from a data set collected from a subject beginning at an arbitrary time within a scanning time interval. A sequence of temporally separated, unfolded parallel view sinograms are generated corresponding to scans through the subject during the scanning time interval. Data from each of the sinograms are folded into each other such that loss of information and image artifacts, caused by temporal separation between temporally adjacent sinograms, are greatly reduced. An image is generated from a subset of data taken from the folded sinograms wherein the subset of data begins at an arbitrary time within the scanning time interval.
    Type: Application
    Filed: November 15, 2002
    Publication date: May 20, 2004
    Inventor: Geordie Henry Zapalac
  • Method and apparatus for scatter measurement using an occluded detector ring
    Publication number: 20040091079
    Abstract: Certain embodiments include a system and method for scatter measurement and correction. The method includes performing a calibration scan using a phantom to measure a scatter signal ratio between scatter x-rays impacting a first detector ring and scatter x-rays impacting a second detector ring. The scatter signal ratio is used to determine a scatter scale factor. The method further includes positioning a collimator such that the first detector ring is occluded from a path of primary x-rays generated by a target. The method also includes executing a low exposure scan to obtain x-ray scatter data using the first detector ring and the second detector ring and applying the scatter scale factor to the scatter data to produce scaled scatter data. The method further includes obtaining image data using the first detector ring and/or the said second detector ring and adjusting the image data using the scaled scatter data.
    Type: Application
    Filed: November 12, 2002
    Publication date: May 13, 2004
    Inventor: Geordie Henry Zapalac