Method for production of computer-tomographic scans during an intervention

A computer-tomographic system, comprising:

• an X-ray tube to produce of a beam cone, movable on a rotation plane around the patient, and a detector including a plurality of detector elements, to measure radiation intensity after passing through the patient;
• a control unit to control relative position and orientation of the patient with respect to a gantry, holding the X-ray tube and the detector;
• and
• a computation unit to evaluate the measured values of the detector and to reconstruct computer-tomographic scans with the aid of computer programs which, when run on the computation and control unit, perform, moving the X-ray tube on a rotation plane around the patient to produce a beam cone, a central direction of beams of the beam cone being set at an angle to an intervention axis, the detector measuring the radiation intensity after passing through the patient, controlling position and orientation of the patient relative to the gantry, reconstructing computer-tomographic scans from the measured values, and displaying at least one slice plane, which is parallel to the intervention axis, differing from the rotation plane of the beam cone, of a reconstructed computer-tomographic scan on a display,
• wherein the control unit is configured to set an inclination of the angle of the central direction of the scanning beam cone to the intervention axis by inclining the rotation plane of the gantry with respect to a system axis that is substantially parallel to the patient and is configured to detect the intervention axis, and
• the computation unit is configured to calculate during the scan the maximum angle settable between the central direction of the scanning beam cone and the intervention axis, usable to display a predetermined region on the plane of the intervention axis, the maximum angle being adjusted such that it is continuously matched.