Patent ID: 8111894

Claim:
A Computer Tomography (CT) C-arm system for examination of an object of interest, the CT- C-arm system comprising: an X-ray tube adapted for generating X-rays; an X-ray detection unit to acquire a set of CT slices; wherein the X-ray tube, and the X-ray detection unit are adapted to be rotatable on a C-arm around a common axis around the object under examination; a processing unit by which the following steps are executable: acquiring a first 3D data volume of the CT slices using first scan parameters; adjusting the first data volume to a second data volume (segmented volume) such that voxel values of the first data volume of at least one predefined range of Hounsfield (H) are set to an at least one predefined H-value; generating a forward projection of the second data volume using the first scan parameters; reconstructing the projection to a third data volume; generating a fourth data volume (artefact-only volume) by subtracting the third volume with the second volume; and generating a fifth volume by adding the first volume with the fourth volume.