公开(公告)号：US11694363B2

公开(公告)日：2023-07-04

申请号：US17275052

申请日：2019-09-11

Applicant: Brainlab AG

Inventor： Sebastian Stopp ,  Johannes Zügner ,  Johannes Manus ,  José Gardiazabal

IPC: G06T7/00 ,  G06T7/80 ,  A61B34/20 ,  A61B34/00 ,  A61B90/00 ,  G06T7/246 ,  H04N17/00 ,  H04N23/67

CPC classification number: G06T7/80 ,  A61B34/20 ,  A61B34/25 ,  A61B90/39 ,  G06T7/246 ,  H04N17/002 ,  H04N23/67 ,  A61B2034/2055 ,  A61B2090/3937 ,  G06T2200/24 ,  G06T2207/30004 ,  G06T2207/30204

Abstract: A method of determining a focal length of a camera and/or of adjusting a viewing direction in a graphical representation of a pre-operative image is provided. The method includes providing uncalibrated camera data of a camera, specifying an initial value of a focal length of the camera, specifying a working distance value of a distance between the camera and the at least part of the tracking system, calculating a distance value of the distance between the camera and the at least part of the tracking system based on the uncalibrated camera data and based on the specified initial value of the focal length of the camera, calculating a change factor based on the specified working distance value and the calculated distance value, and calculating an adapted value of the focal length of the camera based on the initial value of the focal length and based on the change factor.

公开(公告)号：US11062465B2

公开(公告)日：2021-07-13

申请号：US16083928

申请日：2017-03-09

Applicant: Brainlab AG

Inventor： Sebastian Stopp ,  Johannes Manus ,  Sven Flossmann ,  Martin Pregler ,  Uli Mezger ,  Manfred Weiser

IPC: G06T7/292 ,  A61B34/20 ,  G06T7/70 ,  A61B90/20 ,  A61B90/00

Abstract: A medical tracking method for tracking a spatial position of a medical instrument within a medical workspace including an anatomical structure of a patient. The method includes: acquiring, using a first camera targeted on the medical workspace, instrument position data describing a spatial position of the medical instrument with respect to a first camera; acquiring, using a second camera and at least one optical tracking marker that is adapted to be recognized by the second camera, camera position data describing a spatial position of the first camera with respect to the anatomical structure, determining, based on the instrument position data and the camera position data, tracking data describing the spatial position of the medical instrument with respect to the anatomical structure; and tracking the spatial position of the medical instrument within the medical workspace using the tracking data.