Patents by Inventor Kalle KARHU

Kalle KARHU 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).

  • Patient movement correction method for cone-beam computed tomography
    Patent number: 10636179
    Abstract: A patient movement correction method for cone-beam computed tomography wherein a set of X-ray projection images of the patient is acquired using the X-ray imaging means. An initial projection geometry estimate describing the spatial positions and orientation of the X-ray source and the X-ray detector during the acquisition of an X-ray projection images is defined. An intermediate CBCT reconstruction using the X-ray projection images and the initial projection geometry estimate is computed. Projection-image-specific corrective geometric transformations are determined for the initial projection geometry estimate and the intermediate CBCT reconstruction.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: April 28, 2020
    Assignee: Planmeca OY
    Inventors: Mikko Lilja, Kalle Karhu, Jaakko Lahelma, Kustaa Nyholm, Ari Hietanen, Timo Muller, Sakari Kettunen
  • PATIENT MOVEMENT CORRECTION METHOD FOR CONE-BEAM COMPUTED TOMOGRAPHY
    Publication number: 20180268574
    Abstract: A patient movement correction method for cone-beam computed tomography wherein a set of X-ray projection images of the patient is acquired using the X-ray imaging means. An initial projection geometry estimate describing the spatial positions and orientation of the X-ray source and the X-ray detector during the acquisition of an X-ray projection images is defined. An intermediate CBCT reconstruction using the X-ray projection images and the initial projection geometry estimate is computed. Projection-image-specific corrective geometric transformations are determined for the initial projection geometry estimate and the intermediate CBCT reconstruction.
    Type: Application
    Filed: March 19, 2018
    Publication date: September 20, 2018
    Inventors: Mikko LILJA, Kalle KARHU, Jaakko LAHELMA, Kustaa NYHOLM, Ari HIETANEN, Timo MULLER, Sakari KETTUNEN