Patent ID: 8908023
Filing Date: 2014-12-09
Classification: A61B,A61C,G06K,G06T

Abstract:
1. A method for recording of three-dimensional position, location or movement of at least one part of a body of a patient arranged in an object space by means of electronic image recognition using at least one image recording camera, whereby position, location or movement is recorded three-dimensionally independently by each one image recording camera, the method comprising the following process steps: a) Connecting at least one movable graphic marker with at least one body part, wherein at least one geometrical size characteristic of the graphic marker is known; b) Generating an image of at least the area of the body part containing the graphic marker with each image recording camera; c) Transferring the image of each image recording camera as an image file into an electronic processor device; d) In the image space of each image file, localizing of the image of the graphic marker contained in the image file by means of application of an automated image recognition procedure to the image file; e) Determining the size characteristic of the graphic marker in each image space; f) Calibrating the recording system by determining three-dimensional absolute position data of the graphic marker in the object space directly relative to each one image recording camera by means of calculating distance and angle between the graphic marker and the respective image recording camera using the size characteristic of the graphic marker in the image space as determined by the respective image recording camera and the known size characteristic of the graphic marker in the object space together with the imaging properties of the respective camera lens; g) Transferring the determined data regarding the three-dimensional absolute position of the graphic marker in the object space into a data storage wherein at least steps b) to f) are carried out independently for each camera and its respective image.