Method and system for controlling an FFS X-ray system

A system for controlling an FFS X-ray system including an X-ray source, which is guided in a circular movement around a detector to produce a plurality of projection images, wherein an X-ray beam collimated by a collimator aperture is turned on and off repeatedly during the circular movement, and wherein, for an FFS deflection, the FFS X-ray system includes an FFS deflection coil with which a focal point of an electron beam generating the X-ray beam is deflectable between a cathode and an anode of the X-ray source, the system comprising:

• a simulation unit configured to simulate a beam geometry of the X-ray beam at a specified FFS deflection onto the detector during a recording of a projection image;
• a determining unit configured to determine whether cross-radiation is present in a region around the detector by the simulated beam geometry of the X-ray beam;
• and
• a control data unit configured to generate a control data set including FFS control data for the recording of the projection image, wherein
• the FFS control data either (i) causes the FFS deflection that is reduced relative to the specified FFS deflection for the recording of the projection image in an event of the cross-radiation being present for the recording of the projection image, or (ii) causes the specified FFS deflection otherwise.

A system for controlling an FFS X-ray system including an X-ray source, which is guided in a circular movement around a detector to produce a plurality of projection images, wherein an X-ray beam collimated by a collimator aperture is turned on and off repeatedly during the circular movement, and wherein, for an FFS deflection, the FFS X-ray system includes an FFS deflection coil with which a focal point of an electron beam generating the X-ray beam is deflectable between a cathode and an anode of the X-ray source, the system comprising:

• processing circuitry configured to:
• simulate a beam geometry of the X-ray beam at a specified FFS deflection onto the detector during a recording of a projection image,
• determine whether cross-radiation is present in a region around the detector by the simulated beam geometry of the X-ray beam, and
• generate a control data set including FFS control data for the recording of the projection image, wherein
• the FFS control data either (i) causes the FFS deflection that is reduced relative to the specified FFS deflection for the recording of the projection image in an event of the cross-radiation being present for the recording of the projection image, or (ii) causes the specified FFS deflection otherwise.