Computer-implemented method for processing x-ray images

Abstract

The invention relates to a computer-implemented method for processing X-ray images (2), comprising the steps of: providing a sequence (1) of X-ray images (2) of an image region (3) in which at least one section of a vascular system (4) of an examination object (28) is mapped, wherein the sequence describes the temporal progression of the X-ray intensity in the detected image region (3) due to a change in the contrast agent distribution in a section of the vascular system; determining a contrast medium variable (20) dependent on the contrast medium distribution as a function of the temporal course (14) of the variable dependent on the X-ray intensity in the selected sub-region (7) of the X-ray image (2); determining an image (21, 24) of a section of the vascular system from at least one of the sequence of X-ray images; and modifying (22) the image (21, 24) of the section of the vascular system as a function of the contrast agent variable (20) in order to provide output data (23).

Description

technical field [0001] The invention relates to a computer-implemented method for processing X-ray images. Furthermore, the invention relates to a processing device, an x-ray device for medical imaging, a computer program and a computer-readable data carrier. Background technique [0002] In the field of contrast agent-based x-ray imaging, in particular within the framework of angiographic imaging, blood is made visible in x-ray images by injecting a contrast agent into the vascular system of a patient under examination. For example, contrast agents containing iodine or gadolinium can be used as contrast agents. The corresponding contrast medium at least partially or even completely temporarily replaces the blood in the corresponding blood vessel. A series of X-ray images are acquired during or immediately after the injection of the contrast agent. Since the x-ray absorption of the respective contrast medium is significantly higher than that of blood or surrounding tissue...

AI Technical Summary

Problems solved by technology

The two discussed documents use relatively complex models to consider the mentioned parameters and thus require relatively complex calculations

Furthermore, the parameters of the contrast agent administration can only be taken into account if they are known precisely, which on the one hand increases the effort and on the other hand is ultimately only possible in the case of automatic contrast agent injection

[0009] However, in many applications manual contrast medium injections are used, so that for example the exact pressure profile of the contrast medium injection is not known

In these cases, corresponding changes cannot be compensated for, so that comparisons of differently imaged vasculatures can only be continued to a limited extent

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