Method for correcting truncation artifacts in a reconstruction method for computer tomography recordings

A method for correcting a truncation artifact in reconstructing computer tomography recordings, comprising:

• emitting a divergent radiation by a radiation source;
• irradiating an object to be examined with the divergent radiation in a plurality of different projection directions;
• recording a plurality of projection images of the object by detecting the divergent radiation penetrated the object;
• extending the projection images by extrapolation;
• smoothing projection data of the projection images with a digital smoothing polynomial filter to reduce a noise portion of the projection data;
• and
• computing a truncated portion of the projection data from the smoothed projection data.

A medical system for correcting a truncation artifact in reconstructing computer tomography-recordings, comprising:

• a computer tomography device that records a plurality of projection images of an object to be examined;
• and
• an imaging processing device that:
• extends the projection images by extrapolation,
• smoothes projection data of the projection images with a digital smoothing polynomial filter to reduce a noise portion of the projection data, and
• computes a truncated portion of the projection data from the smoothed projection data by an extrapolation method.