Method of and device for forming X-ray images

Abstract

The invention relates to a method of forming X-ray images (B) from at least two series of projection data sets (P1, P2) successively acquired along different trajectories (T1, T2), a respective 3D data set (S1, S2) being formed from each series of projection data sets (P1, P2). In order to neutralize motions of the patient between the acquisition of the individual series of projection data sets upon combination of the 3D data sets so as to form X-ray images which are as free from artefacts as possible, the invention proposes to determine a transformation rule (F) describing the location in space of the 3D data sets (S1, S2) relative to one another in such a manner that voxels are selected in a 3D data set (S1) and their location in the other 3D data set (S2) is determined by means of a suitable similarity measure, after which X-ray images (B) are formed from the 3D data sets (S1, S2) combined by means of the transformation rule (F). Consequently, it is possible to dispense with phantom members that are to be reproduced for fine adjustment of the individual 3D data sets as well as with manual fine adjustment steps. The invention also relates to an X-ray device constructed for this purpose.

Dependencies are inferred from the claim text.