Patents by Inventor Astrid Fatou Lewalter

Astrid Fatou Lewalter 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).

  • Multi-tube imaging system scatter correction
    Patent number: 7680241
    Abstract: A computed tomography reconstruction method includes concurrently emitting radiation from at least two x-ray sources (14), switching the output state of each of the at least two x-ray sources (14) within a plurality of respective cross scatter sampling intervals (50, 52, 54, 56) and detecting with a corresponding one of the sets of detectors (24) cross scatter radiation emitted by the other at least two x-ray sources (14), wherein the cross scatter sampling intervals are angularly spaced over a plurality of frames to allow the at least two x-ray sources (14) to concurrently emit radiation throughout at least one frame, deriving scatter correction data for each set of detectors (24) from corresponding cross scatter samples, scatter correcting the projection data with corresponding scatter correction data, and reconstructing the scatter corrected projection data to generate at least one image.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: March 16, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Bernd David, Michael Grass, Astrid Fatou Lewalter, Rainer Pietig
  • MULTI-TUBE IMAGING SYSTEM SCATTER CORRECTION
    Publication number: 20090279659
    Abstract: A computed tomography reconstruction method includes concurrently emitting radiation from at least two x-ray sources (14), switching the output state of each of the at least two x-ray sources (14) within a plurality of respective cross scatter sampling intervals (50, 52, 54, 56) and detecting with a corresponding one of the sets of detectors (24) cross scatter radiation emitted by the other at least two x-ray sources (14), wherein the cross scatter sampling intervals are angularly spaced over a plurality of frames to allow the at least two x-ray sources (14) to concurrently emit radiation throughout at least one frame, deriving scatter correction data for each set of detectors (24) from corresponding cross scatter samples, scatter correcting the projection data with corresponding scatter correction data, and reconstructing the scatter corrected projection data to generate at least one image.
    Type: Application
    Filed: June 13, 2007
    Publication date: November 12, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.
    Inventors: Bernd David, Michael Grass, Astrid Fatou Lewalter, Rainer Pietig