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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
- Title
- Iterative reconstruction methods for multi-slice computed tomography
- 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 an image in response to the projection data using a computed tomography modeled iterative reconstruction technique. The iterative reconstruction technique includes determining a cross-section reconstruction vector, which approximately matches the projection data via a computed tomography model. Methods for performing the same are also provided including accounting for extended boundary regions.
- Creator
- Ken D. Sauer, Charles A. Bouman, Jean-Baptiste Thibault, Jiang Hsieh
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Systems and methods for filtering data in a medical imaging system
- 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.
- Creator
- Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Methods, apparatus, and software to compensate for failed or degraded components
- 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.
- Creator
- Jiang Hsieh, Charles A. Bouman, Ken D. Sauer, Jean-Baptiste Thibault
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Methods, apparatus, and software for reconstructing an image
- 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.
- Creator
- Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Iterative Reconstruction
- 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 detectors, and iteratively reconstructing the portions of the first image to create a reconstructed image.
- Creator
- Kai Zeng, Charles A. Bouman, Bruno Kristiaan Bernard De Man, Jiang Hsieh, Ken D. Sauer, Jean-Baptiste Thibault, Zhou Yu
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- System and method of iterative image reconstruction for computed tomography
- 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 the set of projection data based on the regularizing function.
- Creator
- Jean-Baptiste Thibault, Zhou Yu, Jiao Wang, Ken D. Sauer, Charles A. Bouman
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Method and apparatus for iterative reconstruction
- 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-problems includes reconstructing the image by optimizing a first objective function. The first objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. An inner loop iteratively optimizes a second objective function approximating the first objective function. An outer loop utilizes the solution of the second objective function to optimize the first objective function.
- Creator
- 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
- Publisher
- United States Patent and Trademark Office
- Language
- English
- Rights
- All rights reserved
- 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
- Title
- Method and system for image reconstruction
- 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 response to the projection data via an iterative reconstruction technique configured to perform a targeted statistical reconstruction.
- Creator
- Charles A. Bouman, Ken D. Sauer, Jean-Baptiste Thibault, Zhou Yu
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Method and system for iterative reconstruction
- 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 image quality at a fixed computation time, or both.
- Creator
- Jean-Baptiste Thibault, Jiang Hsieh, Bruno Kristiaan Bernard De Man, Samit Kumar Basu, Zhou Yu, Ken D. Sauer, Charles A. Bouman
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Methods and systems for improving quality of an image
- 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.
- Creator
- Ken D. Sauer, Charles A. Bouman, Jiang Hsieh, Jean-Baptiste Thibault
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Methods, apparatus, and software to facilitate computing the elements of a forward projection matrix
- 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.
- Creator
- Jean-Baptiste Thibault, Ken D. Sauer, Charles A. Bouman, Jiang Hsieh
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- 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
- Title
- Methods, apparatus, and software to facilitate iterative reconstruction of images
- 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.
- Creator
- Ken D. Sauer, Jean-Baptiste Thibault, Charles A. Bouman, Jiang Hsieh
- Publisher
- United States Patent and Trademark Office
- Language
- eng
- Rights
- http://creativecommons.org/publicdomain/zero/1.0/
- Resource Type
- Patent