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  • Inventor(s):
    Jean-Baptiste Thibault, Charles A. Bouman, Jeffrey Allen Fessler, Ken D. Sauer
    Patent Number:
    US 7885371 B2
    Description:

    A method and system for image reconstruction of data acquired by a device such as computed tomography is provided. The method and system use a multi-stage statistical iterative reconstruction techniques to provide a three dimensional representation of the scanned object. In one embodiment, the first stage uses a projection-based reconstruction technique, such as Ordered Subset (OS) to converge on a solution for low frequency portion of the image. A subsequent stage uses a voxel-based reconstr…

    Date Issued:
    2011-02-08
    Resource Type
    Patent
  • Inventor(s):
    Jiang Hsieh, Jean-Baptiste Thibault, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 6768782 B2
    Description:

    An imaging system is provided including a source generating an x-ray beam and a detector array receiving the x-ray beam and generating projection data corresponding to at least a scanned portion of an object. An image reconstructor is electrically coupled to said detector array and reconstructs an image of the scanned portion of the object for a full field-of-view in response to said projection data using a dual iterative reconstruction technique. The dual iterative reconstruction technique i…

    Date Issued:
    2004-07-27
    Resource Type
    Patent
  • Inventor(s):
    Charles A. Bouman, Ken D. Sauer, Jiang Hsieh, Jean-Baptiste Thibault
    Patent Number:
    US 7308071 B2
    Description:

    A method of reconstructing an image includes substantially minimizing a cost function of the form .times..times..times..times..times..function..function..function. ##EQU00001## where {circumflex over (x)} is the value of x which achieves the minimum summation, y.sub.m is an integral projection, F.sub.m(x) is an forward projection function, and S(x) is a stabilizing function, to obtain {circumflex over (x)}, and using the obtained {circumflex over (x)} to perform a multislice Computed Tomograp…

    Date Issued:
    2007-12-11
    Resource Type
    Patent
  • Inventor(s):
    Jeffrey Allen Fessler, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault, Ken D. Sauer, Bruno Kristiaan Bernard De Man
    Patent Number:
    US 8233682 B2
    Description:

    A method of improving a resolution of an image using image reconstruction is provided. The method includes acquiring scan data of an object and forward projecting a current image estimate of the scan data to generate calculated projection data. The method also includes applying a data-fit term and a regularization term to the scan data and the calculated projection data and modifying at least one of the data fit term and the regularization term to accommodate spatio-temporal information to fo…

    Date Issued:
    2012-07-31
    Resource Type
    Patent
  • Inventor(s):
    Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
    Patent Number:
    US 8218715 B2
    Description:

    Methods and systems for reconstructing an image are provided. The method includes performing a tomographic image reconstruction using a joint estimation of at least one of a gain parameter and an offset parameter, and an estimation of the reconstructed image.

    Date Issued:
    2012-07-10
    Resource Type
    Patent