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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…

    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.

    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.

    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.

    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…

    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.

    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.

    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.

    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…

    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…

    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…

    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 …

    Resource Type
    Patent