Method for determining a distance by X-ray imaging, and X-ray device

摘要

A method for determining a distance between a first point and a second point on an object under examination inside the body of a person under examination by way of x-ray imaging by an x-ray device. The method includes the recording of x-ray images at different relative positionings of the x-ray device, which contain the first and the second point respectively. The relative positionings are substantially shifted in relation to one another in parallel to a central beam. Stereo reconstruction is carried out to define a 3D position of the first point and of the second point. The distance between the first point and the second point is determined from the 3D position of the first point and the 3D position of the second point.

主权项

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.