University of Notre Dame

Search CurateND

Search criteria:

Department or Unit: University of Notre Dame remove ×
Clear all

List of files deposited in CurateND that match your search criteria

  • 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):
    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, Jean-Baptiste Thibault, Ken D. Sauer, Charles A. Bouman
    Patent Number:
    US 7583780 B2
    Description:

    A method for reconstructing an image in a tomographic imaging system is described. The method includes improving a spatial resolution of the image by iteratively reconstructing the image.

    Date Issued:
    2009-09-01
    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):
    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):
    Jean-Baptiste Thibault, Ken D. Sauer, Charles A. Bouman, Jiang Hsieh
    Patent Number:
    US 7272205 B2
    Description:

    A method for calculating an element of a projection includes calculating an element A.sub.i,j of a projection matrix using at least two different rays through a voxel.

    Date Issued:
    2007-09-18
    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):
    Ken D. Sauer, Jean-Baptiste Thibault, Charles A. Bouman, Jiang Hsieh
    Patent Number:
    US 7251306 B2
    Description:

    A method of reconstructing an image includes performing an iterative CT X-ray image reconstruction using a model including a point spread function (PSF) to reconstruct an image.

    Date Issued:
    2007-07-31
    Resource Type
    Patent
  • 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):
    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):
    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