Patent ID: 9273956
Filing Date: 2016-03-01
CPC Classification: A61B,G01B,G01N

Claim Text:
1. A method for determining a distance between a first point and a second point on an object under examination within the body of a person under examination by x-ray imaging with an x-ray device, the method which comprises: recording a first x-ray image containing the first point, with a first relative positioning of an x-ray source to the object under examination; recording a second x-ray image containing the first point, with a second relative positioning of the x-ray source to the object under examination; wherein the first relative positioning and the second relative positioning are shifted relative to one another substantially in parallel to a central beam of the x-ray device; recording a third x-ray image containing the second point, with a third relative positioning of the x-ray source to the object under examination; recording a fourth x-ray image containing the second point, with a fourth relative positioning of the x-ray source to the object under examination; wherein the third relative positioning and the fourth relative positioning are shifted relative to one another substantially in parallel to the central beam of the x-ray device; determining a location of the first point in the first x-ray image and in the second x-ray image; determining a location of the second point in the third x-ray image and in the fourth x-ray image; carrying out a stereo reconstruction based on the locations of the first point thus determined as a corresponding landmark for obtaining a 3D position of the first point; carrying out a stereo reconstruction based on the locations of the second point thus determined as a corresponding landmark for obtaining a 3D position of the second point; and determining the distance between the first point and the second point from the 3D position of the first point and the 3D position of the second point.