Patents by Inventor Dieter Seghers

Dieter Seghers has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11776172
    Abstract: Example methods and systems for tomographic data analysis are provided. One example method may comprise: obtaining first three-dimensional (3D) feature volume data and processing the first 3D feature volume data using an AI engine that includes multiple first processing layers, an interposing forward-projection module and multiple second processing layers. Example processing using the AI engine may involve: generating second 3D feature volume data by processing the first 3D feature volume data using the multiple first processing layers, transforming the second 3D volume data into 2D feature data using the forward-projection module and generating analysis output data by processing the 2D feature data using the multiple second processing layers.
    Type: Grant
    Filed: April 14, 2022
    Date of Patent: October 3, 2023
    Inventors: Pascal Paysan, Benjamin M Haas, Janne Nord, Sami Petri Perttu, Dieter Seghers, Joakim Pyyry
  • Patent number: 11436766
    Abstract: Example methods and systems for tomographic image reconstruction are provided. One example method may comprise: obtaining two-dimensional (2D) projection data and processing the 2D projection data using the AI engine that includes multiple first processing layers, an interposing back-projection module and multiple second processing layers. Example processing using the AI engine may involve: generating 2D feature data by processing the 2D projection data using the multiple first processing layers, reconstructing first three-dimensional (3D) feature volume data from the 2D feature data using the back-projection module; and generating second 3D feature volume data by processing the first 3D feature volume data using the multiple second processing layers.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: September 6, 2022
    Inventors: Pascal Paysan, Benjamin M Haas, Janne Nord, Sami Petri Perttu, Dieter Seghers, Joakim Pyyry
  • Patent number: 11386592
    Abstract: Example methods and systems for tomographic data analysis are provided. One example method may comprise: obtaining first three-dimensional (3D) feature volume data and processing the first 3D feature volume data using an AI engine that includes multiple first processing layers, an interposing forward-projection module and multiple second processing layers. Example processing using the AI engine may involve: generating second 3D feature volume data by processing the first 3D feature volume data using the multiple first processing layers, transforming the second 3D volume data into 2D feature data using the forward-projection module and generating analysis output data by processing the 2D feature data using the multiple second processing layers.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: July 12, 2022
    Inventors: Pascal Paysan, Benjamin M Haas, Janne Nord, Sami Petri Perttu, Dieter Seghers, Joakim Pyyry
  • Patent number: 11173324
    Abstract: Reconstruction of projection images of a CBCT scan is performed by generating simulated projection data, comparing the simulated projection data to the projection images of the CBCT scan, determining a residual volume based on the comparison, and using the residual volume to determine an accurate reconstructed volume. The reconstructed volume can be used to segment a tumor (and potentially one or more organs) and align the tumor to a planning volume (e.g., from a CT scan) to identify changes, such as shape of the tumor and proximity of the tumor to an organ. These changes can be used to update a radiation therapy procedure, such as by altering a radiation treatment plan and fine-tuning a patient position.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: November 16, 2021
    Assignees: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Pascal Paysan, Marcus Brehm, Adam Wang, Dieter Seghers, Josh Star-Lack
  • Patent number: 10524756
    Abstract: One example method to reduce image artifacts, which may include obtaining measured projection data acquired using an imaging system. The measured projection data is associated with a target object and an artifact source within a radiation field of the imaging system. The method may also include generating virtual projection data associated with the artifact source by forward projecting a model representing one or more physical properties of the artifact source. The method may further include generating corrected projection data based on the measured projection data and the virtual projection data; and reconstructing the corrected projection data into reconstructed volume image data to reduce image artifacts caused by the artifact source.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: January 7, 2020
    Assignee: VARIAN MEDICAL SYSTEMS INTERNATIONAL
    Inventors: Pascal Paysan, Luis Melo De Carvalho, Dieter Seghers, Marcus Brehm
  • Publication number: 20180229056
    Abstract: Reconstruction of projection images of a CBCT scan is performed by generating simulated projection data, comparing the simulated projection data to the projection images of the CBCT scan, determining a residual volume based on the comparison, and using the residual volume to determine an accurate reconstructed volume. The reconstructed volume can be used to segment a tumor (and potentially one or more organs) and align the tumor to a planning volume (e.g., from a CT scan) to identify changes, such as shape of the tumor and proximity of the tumor to an organ. These changes can be used to update a radiation therapy procedure, such as by altering a radiation treatment plan and fine-tuning a patient position.
    Type: Application
    Filed: April 13, 2018
    Publication date: August 16, 2018
    Applicants: Varian Medical Systems, Inc., Varian Medical Systems International AG
    Inventors: Pascal Paysan, Marcus Brehm, Adam Wang, Dieter Seghers, Josh Star-Lack
  • Patent number: 8229190
    Abstract: A workflow method for temporal nodule review by registering a reference image R with a floating image F, convolving the reference image R and the floating image with the same window function Hw to generate Rw and Fw, generating a subtraction image by performing subtraction Rw?Fw (g(r)) wherein r represents a voxel (x, y, z) in reference image R, applying a pattern detector to said subtraction image to detect corresponding nodules in reference image R and floating image F and displaying corresponding nodules.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: July 24, 2012
    Assignee: Agfa HealthCare N.V.
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens
  • Patent number: 8229189
    Abstract: Method to bring out a temporal difference between corresponding structures in a reference image R and a floating image F by convolving the reference image R and the floating image F with a window function Hw to generate Rw and Fw, applying a non-rigid transformation resulting in a transformation field g(rR) mapping every location rR to a corresponding location rF in the floating image F and generating a subtraction image by performing subtraction Rw(r)?Fw(g(r)) wherein r represents a voxel (x, y, z) in reference image R.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: July 24, 2012
    Assignee: Agfa HealthCare N.V.
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens
  • Patent number: 8224046
    Abstract: An image point in a displayed reference image R is selected and a non-rigid transformation resulting in a transformation field g(rR) mapping every location rR to a corresponding location rF in a floating image F is applied, next a rigid body transformation is applied to floating image F such that rF coincides with the selected image point and the transformed floating image is displayed.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: July 17, 2012
    Assignee: Agfa HealthCare N.V.
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens
  • Patent number: 8165359
    Abstract: A gray value model is generated encoding photometric knowledge at landmark positions. This step exploits intensity correlation in neighborhoods sampled around landmark positions. A geometric model is generated encoding geometric knowledge between landmarks. This step exploits spatial correlation between landmarks of segmented anatomic entities.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: April 24, 2012
    Assignees: Agfa HealthCare N.V., Katholieke Universiteit Leuven, K.U. Leuven R&D
    Inventors: Piet Dewaele, Dirk Loeckx, Dieter Seghers
  • Patent number: 8023708
    Abstract: For each of a number of landmarks in an image an initial position of the landmark is defined. Next a neighborhood around the initial position, comprising a number of candidate locations of the landmark is sampled and a cost is associated with each of the candidate locations. A cost function expressing a weighted sum of overall gray level cost and overall shape cost for all candidate locations is optimized. A segmented anatomic entity is defined as a path through a selected combination of candidate locations for which combination the cost function is optimized.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: September 20, 2011
    Assignees: Agfa HealthCare N.V., Katholieke Universiteit Leuven, K.U. Leuven R&D
    Inventors: Piet Dewaele, Dirk Loeckx, Dieter Seghers
  • Patent number: 7916917
    Abstract: For each of a number of landmarks in an image an initial position of the landmark is defined. Next a neighborhood around the initial position, comprising a number of candidate locations of the landmark is sampled and a cost is associated with each of the candidate locations. A cost function expressing a weighted sum of overall gray level cost and overall shape cost for all candidate locations is optimized. A segmented anatomic entity is defined as a path through a selected combination of candidate locations for which combination the cost function is optimized.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: March 29, 2011
    Assignee: Agfa HealthCare N.V.
    Inventors: Piet Dewaele, Dirk Loeckx, Dieter Seghers
  • Publication number: 20110026785
    Abstract: For each of a number of landmarks in an image an initial position of the landmark is defined. Next a neighborhood around the initial position, comprising a number of candidate locations of the landmark is sampled and a cost is associated with each of the candidate locations. A cost function expressing a weighted sum of overall gray level cost and overall shape cost for all candidate locations is optimized. A segmented anatomic entity is defined as a path through a selected combination of candidate locations for which combination the cost function is optimized.
    Type: Application
    Filed: March 3, 2010
    Publication date: February 3, 2011
    Applicant: Agfa HealthCare N.V.
    Inventors: Piet Dewaele, Dirk Loeckx, Dieter Seghers
  • Publication number: 20080193005
    Abstract: A workflow method for temporal nodule review by registering a reference image R with a floating image F, convolving the reference image R and the floating image with the same window function Hw to generate Rw and Fw, generating a subtraction image by performing subtraction Rw?Fw (g(r)) wherein r represents a voxel (x, y, z) in reference image R, applying a pattern detector to said subtraction image to detect corresponding nodules in reference image R and floating image F and displaying corresponding nodules.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 14, 2008
    Applicant: AGFA HEALTHCARE NV
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens
  • Publication number: 20080193001
    Abstract: Method to bring out a temporal difference between corresponding structures in a reference image R and a floating image F by convolving the reference image R and the floating image F with a window function Hw to generate Rw and Fw, applying a non-rigid transformation resulting in a transformation field g(rR) mapping every location rR to a corresponding location rF in the floating image F and generating a subtraction image by performing subtraction Rw(r)?Fw(g(r)) wherein r represents a voxel (x, y, z) in reference image R.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 14, 2008
    Applicant: AGFA HEALTHCARE NV
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens
  • Publication number: 20080193000
    Abstract: An image point in a displayed reference image R is selected and a non-rigid transformation resulting in a transformation field g(rR) mapping every location rR to a corresponding location rF in a floating image F is applied, next a rigid body transformation is applied to floating image F such that rF coincides with the selected image point and the transformed floating image is displayed.
    Type: Application
    Filed: February 8, 2008
    Publication date: August 14, 2008
    Applicant: AGFA HEALTHCARE NV
    Inventors: Dieter Seghers, Piet Dewaele, Paul Suetens