Recording X-ray images without scattered radiation

An x-ray imaging apparatus for generating x-ray images of an examination object, the x-ray imaging apparatus comprising:

• an x-ray detector for acquiring an intensity of x-rays incident on the x-ray detector with temporal and spatial resolution;
• an x-ray source for emitting x-rays in a direction of the x-ray detector and an examination object situated between the x-ray detector and the x-ray source;
• an anti-scatter grid arranged between the examination object and the x-ray detector;
• an actuator for moving the anti-scatter grid across a detection surface of the x-ray detector;
• a control apparatus for actuating the actuator;
• and
• an evaluation unit for processing x-ray detector signals taking into account a temporal variation of an acquired intensity of the x-ray detector signals caused by movement of the anti-scatter grid,
• wherein, during the processing of the x-ray detector signals, a transformation of the x-ray detector signals is configured to be carried out from a time domain into a frequency space, and a spectral component of the movement of the anti-scatter grid is configured to be filtered out.

A computer program product comprising a computer program, which is directly loadable into a storage apparatus of a control apparatus of an x-ray imaging apparatus, the computer program comprising program sections, when executed in the control apparatus of the x-ray imaging apparatus, are configured to:

• emit x-rays in a direction of an x-ray detector, wherein an examination object is arranged between the x-ray detector and an x-ray source emitting the x-rays;
• move an anti-scatter grid, which is arranged between the examination object and the x-ray detector, across a detection surface of the x-ray detector;
• acquire x-ray detector signals with temporal and spatial resolution, the x-ray detector signals comprising an intensity of the x-rays incident on the x-ray detector;
• evaluate the x-ray detector signals taking into account a temporal variation of the acquired intensity of the x-ray detector signals caused by the movement of the anti-scatter grid,
• wherein, during the evaluation of the x-ray detector signals, a transformation of the x-ray detector signals is carried out from a time domain into a frequency space, and a spectral component of the movement of the anti-scatter grid is filtered out.

A computer readable medium, on which program sections readable and executable via a computer unit are stored, wherein, when the program sections are executed by the computer unit, the program sections are configured to:

• emit x-rays in a direction of an x-ray detector, wherein an examination object is arranged between the x-ray detector and an x-ray source emitting the x-rays;
• move an anti-scatter grid, which is arranged between the examination object and the x-ray detector, across a detection surface of the x-ray detector;
• acquire x-ray detector signals with temporal and spatial resolution, the x-ray detector signals comprising an intensity of the x-rays incident on the x-ray detector;
• evaluate the x-ray detector signals taking into account a temporal variation of the acquired intensity of the x-ray detector signals caused by the movement of the anti-scatter grid,
• wherein, during the evaluation of the x-ray detector signals, a transformation of the x-ray detector signals is carried out from a time domain into a frequency space, and a spectral component of the movement of the anti-scatter grid is filtered out.