Patents by Inventor Paul H. Chapman

Paul H. Chapman 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).

  • System for determining target positions in the body observed in CT image data
    Patent number: 6359959
    Abstract: This invention relates to the quantitative determination of a target or volume in the living body relative to external apparatus based on CT (computer tomography) or other image data. The invention describes a means of taking CT image data of the anatomy and of natural or implanted index positions on the patient's body, and relating the CT data to a coordinate system related to external apparatus which may be in fixed position relative to the patient. One implementation uses a transformation between the CT image data coordinate system and the second coordinate system. This makes it possible to do frame-based or frameless stereotactic target identification and approaches without the need for attaching a frame to the patient at the time of CT scanning.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: March 19, 2002
    Assignee: Sherwood Services AG
    Inventors: William E. Butler, Paul H. Chapman, Eric R. Cosman
  • System for determining target positions in the body observed in CT image data
    Patent number: 6122341
    Abstract: This invention relates to the quantitative determination of a target or volume in the living body relative to external apparatus based on CT (computer tomography) or other image data. The invention describes a means of taking CT image data of the anatomy and of natural or implanted index positions on the patient's body, and relating the CT data to a coordinate system related to external apparatus which may be in fixed position relative to the patient. One implementation uses a transformation between the CT image data coordinate system and the second coordinate system. This makes it possible to do frame-based or frameless stereotactic target identification and approaches without the need for attaching a frame to the patient at the time of CT scanning.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 19, 2000
    Inventors: William E. Butler, Paul H. Chapman, Eric R. Cosman