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  • Inventor(s):
    Ken D. Sauer, Charles A. Bouman, Jean-Baptiste Thibault, Jiang Hsieh
    Patent Number:
    US 6907102 B2
    Description:

    A multi-slice computed tomography imaging system is provided including a source that generates an x-ray beam and a detector array that receives the x-ray beam and generates projection data. A translatable table has an object thereon and is operable to translate in relation to the source and the detector array. The source and the detector array rotate about the translatable table to helically scan the object. An image reconstructor is electrically coupled to the detector array and reconstructs…

    Date Issued:
    2005-06-14
    Resource Type
    Patent
  • Inventor(s):
    Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
    Patent Number:
    US 7676074 B2
    Description:

    A method for filtering a measurement of density of an object is described. The method includes filtering the measurement of the density and preserving a local average of the measurement and additional measurements when performing the filtering.

    Date Issued:
    2010-03-09
    Resource Type
    Patent
  • Inventor(s):
    Jiang Hsieh, Charles A. Bouman, Ken D. Sauer, Jean-Baptiste Thibault
    Patent Number:
    US 7440602 B2
    Description:

    A method for improving images of an imaging system including a plurality of detector cells includes assigning a quality factor for each detector cell.

    Date Issued:
    2008-10-21
    Resource Type
    Patent
  • Inventor(s):
    Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
    Patent Number:
    US 7327822 B2
    Description:

    A method of reconstructing an image includes combining a two-dimensional forward projection function and a three-dimensional stabilizing function to generate an iterative reconstruction algorithm, and using the obtained iterative reconstruction algorithm to perform a multislice Computed Tomography (CT) reconstruction to generate an image.

    Date Issued:
    2008-02-05
    Resource Type
    Patent
  • Inventor(s):
    Kai Zeng, Charles A. Bouman, Bruno Kristiaan Bernard De Man, Jiang Hsieh, Ken D. Sauer, Jean-Baptiste Thibault, Zhou Yu
    Patent Number:
    US 8655033 B2
    Description:

    An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a plurality of detectors of the provided projection data, reconstructing portions of the first image with the plurality of enlarged voxels or detecto…

    Date Issued:
    2014-02-18
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Zhou Yu, Jiao Wang, Ken D. Sauer, Charles A. Bouman
    Patent Number:
    US 8416914 B2
    Description:

    A non-transitory computer readable storage medium having stored thereon a computer program having instructions, which, when executed by a computer, cause the computer to acquire a set of projection data corresponding to a plurality of image voxels and to calculate coefficients of a regularizing function configured to penalize differences between pairs of the plurality of voxels that are not immediate neighbors. The instructions also cause the computer to iteratively reconstruct an image from …

    Date Issued:
    2013-04-09
    Resource Type
    Patent
  • Inventor(s):
    Zhou Yu, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Debashish Pal, Lin Fu, Charles A. Bouman, Ken D. Sauer, Sathish Ramani, Jeffrey Allen Fessler, Somesh Srivastava
    Patent Number:
    US 8885975 B2
    Description:

    A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-prob…

    Date Issued:
    2014-11-11
    Resource Type
    Patent
  • Inventor(s):
    Charles A. Bouman, Ken D. Sauer, Jean-Baptiste Thibault, Zhou Yu
    Patent Number:
    US 8135186 B2
    Description:

    Disclosed is an imaging system including a source generating an x-ray beam, a detector array receiving the x-ray beam and generating projection data, a translatable table configured for disposal of an object thereon and operable to translate in relation to the source and the detector array, the source and the detector array rotating about the translatable table to scan the object, and an image reconstructor electrically coupled to the detector array and configured to reconstruct an image in r…

    Date Issued:
    2012-03-13
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Jiang Hsieh, Bruno Kristiaan Bernard De Man, Samit Kumar Basu, Zhou Yu, Ken D. Sauer, Charles A. Bouman
    Patent Number:
    US 8175115 B2
    Description:

    A method for reconstructing an image of an object, the image comprising a plurality of image elements, is disclosed. The method includes accessing image data associated with the plurality of image elements, applying a first algorithm to the plurality of image elements, selecting a spatially non-homogenous set of the plurality of image elements, and applying an iterative algorithm to the set of image elements to reduce an amount of time necessary for reconstructing the image, or to improve an …

    Date Issued:
    2012-05-08
    Resource Type
    Patent
  • Inventor(s):
    Zhou Yu, Evgeny Drapkin, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Kai Zeng, Jiang Hsieh, Brian E. Nett, Debashish Pal, Lin Fu, Guangzhi Cao, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 9020230 B2
    Description:

    A method for reconstructing an image of an object that includes a plurality of image elements. The method includes accessing image data associated with a plurality of image elements, and reconstructing an image of the object by optimizing an objective function, where the objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. The algorithm is composed of nested iterative loops, in which an inner loop iteratively optimizes an objective fun…

    Date Issued:
    2015-04-28
    Resource Type
    Patent
  • Inventor(s):
    Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
    Patent Number:
    US 7983462 B2
    Description:

    A method for improving quality of an image is described. The method includes reconstructing a first image of a sample volume, segmenting the first image to generate a first region and a second region, reconstructing a second image of the sample volume, and generating a final image from a combination of the segmentation, the first image, and the second image.

    Date Issued:
    2011-07-19
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Xue Rui, Somesh Srivastava, Ken D. Sauer, Lin Fu, Charles A. Bouman
    Patent Number:
    US 9261467 B2
    Description:

    A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and met…

    Date Issued:
    2016-02-16
    Resource Type
    Patent