Adaptive method for generating artifact-reduced ct image data

An image data reconstruction device, comprising:

• an input interface to acquire projection measurement data of an examination region of an examination object;
• a reconstruction unit to reconstruct uncorrected image data based upon the projection measurement data;
• a subregion determination unit to determine artifact-affected subregions of the examination region based upon uncorrected image data;
• a correction unit to carry out an artifact-reduced image reconstruction in the artifact-affected subregions of the examination region, only artifact-reduced subimage data of the artifact-affected subregions being generated;
• and
• an image generation unit to generate artifact-reduced image data of an entirety of the examination region by combining at least one part of the uncorrected image data and the artifact-reduced subimage data.

An image data reconstruction device, comprising:

• an input interface to acquire projection measurement data of an examination region of an examination object;
• and
• a processor, configured to
• reconstruct uncorrected image data based upon the projection measurement data,
• determine artifact-affected subregions of the examination region based upon uncorrected image data,
• carry out an artifact-reduced image reconstruction in the artifact-affected subregions of the examination region, only artifact-reduced subimage data of the artifact-affected subregions being generated, and
• generate artifact-reduced image data of an entirety of the examination region by combining at least one part of the uncorrected image data and the artifact-reduced subimage data.