Patents by Inventor Geerd Richard Kemkers

Geerd Richard Kemkers 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).

  • Method of and device for forming X-ray images
    Patent number: 6438194
    Abstract: The invention relates to a method of forming X-ray images (B) from at least two series of projection data sets (P1, P2) successively acquired along different trajectories (T1, T2), a respective 3D data set (S1, S2) being formed from each series of projection data sets (P1, P2). In order to neutralize motions of the patient between the acquisition of the individual series of projection data sets upon combination of the 3D data sets so as to form X-ray images which are as free from artefacts as possible, the invention proposes to determine a transformation rule (F) describing the location in space of the 3D data sets (S1, S2) relative to one another in such a manner that voxels are selected in a 3D data set (S1) and their location in the other 3D data set (S2) is determined by means of a suitable similarity measure, after which X-ray images (B) are formed from the 3D data sets (S1, S2) combined by means of the transformation rule (F).
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: August 20, 2002
    Assignee: Koninklijke Philips Electronics. N.V.
    Inventors: Michael Grass, Geerd Richard Kemkers
  • Method of and device for forming X-ray images
    Publication number: 20010043671
    Abstract: The invention relates to a method of forming X-ray images (B) from at least two series of projection data sets (P1, P2) successively acquired along different trajectories (T1, T2), a respective 3D data set (S1, S2) being formed from each series of projection data sets (P1, P2). In order to neutralize motions of the patient between the acquisition of the individual series of projection data sets upon combination of the 3D data sets so as to form X-ray images which are as free from artefacts as possible, the invention proposes to determine a transformation rule (F) describing the location in space of the 3D data sets (S1, S2) relative to one another in such a manner that voxels are selected in a 3D data set (S1) and their location in the other 3D data set (S2) is determined by means of a suitable similarity measure, after which X-ray images (B) are formed from the 3D data sets (S1, S2) combined by means of the transformation rule (F).
    Type: Application
    Filed: January 16, 2001
    Publication date: November 22, 2001
    Inventors: Michael Grass, Geerd Richard Kemkers