Dynamic error correction in radiographic imaging

An apparatus for radiography with X-rays, comprising:

• an imaging system comprising an X-ray source and an X-ray detector for generating radiographic raw images of an object;
• a sensor arrangement adapted for determining displacement data of the object;
• a control unit adapted for controlling the motion of the imaging system and for generating a view of the object based on the radiographic raw images by an imaging processing, in which
• an operator is used, which relates a plurality of radiographic raw images with the view of the object without transforming the radiographic images individually, in which
• the displacement of the object during an acquisition process is taken into account by modifying the operator in dependency of the displacement data, and in which
• the displacement data are determined individually with respect to differently moving parts of the object while maintaining a cohesion of the different parts of the object;
• wherein a reconstruction process resulting in tomographic images is used for the imaging processing;
• and
• wherein a frequency based reconstruction process is used, in which absorption coefficients associated with a given volume element are obtained by applying a backprojection on filtered radiographic raw images taken from various positions along a trajectory, wherein the backprojection is performed along the radiation paths associated with the imaging system on a virtual trajectory.

An apparatus for radiography with X-rays, comprising:

• an imaging system comprising an X-ray source and an X-ray detector for generating radiographic raw images of an object;
• a sensor arrangement adapted for determining displacement data of the object;
• a control unit adapted for controlling the motion of the imaging system and for generating a view of the object based on the radiographic raw images by an imaging processing, in which
• an operator is used, which relates a plurality of radiographic raw images with the view of the object without transforming the radiographic images individually, in which
• the displacement of the object during an acquisition process is taken into account by modifying the operator in dependency of the displacement data, and in which
• the displacement data are determined individually with respect to differently moving parts of the object while maintaining a cohesion of the different parts of the object;
• wherein a reconstruction process resulting in tomographic images is used for the imaging processing;
• and
• wherein a frequency based reconstruction process is used, in which absorption coefficients associated with a given volume element are obtained by applying a rebinning process on the radiographic raw images, in which projection data of a two-dimensional slice of the object are estimated on the basis of the displacement data, and by applying a two-dimensional reconstruction process on the projection data.

An apparatus for radiography with X-rays, comprising:

• an imaging system comprising an X-ray source and an X-ray detector for generating radiographic raw images of an object;
• a sensor arrangement adapted for determining displacement data of the object;
• a control unit adapted for controlling the motion of the imaging system and for generating a view of the object based on the radiographic raw images by an imaging processing, in which
• an operator is used, which relates a plurality of radiographic raw images with the view of the object without transforming the radiographic images individually, in which
• the displacement of the object during an acquisition process is taken into account by modifying the operator in dependency of the displacement data, and in which
• the displacement data are determined individually with respect to differently moving parts of the object while maintaining a cohesion of the different parts of the object;
• wherein, in the imaging processing, the displacement of the object during the acquisition process is taken into account by treating the object as stationary and replacing an actual trajectory of the imaging system by a virtual trajectory resulting in a spatial relation between the stationary object and the imaging system on the virtual trajectory that corresponds to a spatial relation between the displaced object and the imaging system on the actual trajectory.