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  • 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):
    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):
    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
  • Inventor(s):
    Jean-Baptiste Thibault, Bruno Kristiaan Bernard De Man, Kai Zeng, Zhou Yu, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 8787521 B2
    Description:

    A system and method include acquisition of a set of image data corresponding to a time period of data acquisition, the set of image data corresponding to a plurality of voxels, wherein each of the plurality of voxels corresponds to a distinct acquisition time within the time period of data acquisition. The system and method further include the modeling of the plurality of voxels as a function of time based on a plurality of kinetic parameters associated therewith and reconstruction of an imag…

    Date Issued:
    2014-07-22
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Debashish Pal, Jie Tang, Ken D. Sauer, Charles A. Bouman, Ruoqiao Zhang
    Patent Number:
    US 9460485 B2
    Description:

    A method includes obtaining spectral computed tomography (CT) information via an acquisition unit having an X-ray source and a CT detector. The method also includes, generating, with one or more processing units, using at least one image transform, a first basis image and a second basis image using the spectral CT information. Further, the method includes performing, with the one or more processing units, guided processing on the second basis image using the first basis image as a guide to pr…

    Date Issued:
    2016-10-04
    Resource Type
    Patent
  • Inventor(s):
    Guangzhi Cao, Jiang Hsieh, Jean-Baptiste Thibault, Jiahua Fan, Ken D. Sauer
    Patent Number:
    US 9538974 B2
    Description:

    Various methods and systems are provided for estimating and compensating for table deflection in reconstructed images. In one embodiment, a method for computed tomography (CT) imaging comprises reconstructing images from data acquired during a helical CT scan where table deflection parameters are estimated and the reconstruction is adjusted based on the table deflection parameters. In this way, images may be reconstructed without artifacts caused by table deflection.

    Date Issued:
    2017-01-10
    Resource Type
    Patent