Suppression of ring artefacts when tomographing anisotropically attenuating samples

Area of Science:

• Medical Imaging
• Materials Science
• Computational Science

Background:

• Computerized X-ray tomography (CXT) is susceptible to ring artifacts caused by sample rotation.
• These artifacts degrade the quality of tomographic reconstructions, especially for objects with varying attenuation.
• Existing methods may not be universally applicable or efficient.

Purpose of the Study:

• To present a novel, rapid method for suppressing ring artifacts in CXT.
• To ensure the method's applicability to both parallel and cone-beam CXT geometries.
• To validate the technique's effectiveness on diverse sample types.

Main Methods:

• Development of an analytical formula for artifact correction.
• Implementation of the correction via matrix-vector multiplication.
• Testing the method on paleontological and composite material samples.

Main Results:

• Successful suppression of ring artifacts was demonstrated.
• The method proved effective for both parallel and cone-beam CXT.
• High-quality tomographic reconstructions were achieved for complex samples.

Conclusions:

• The proposed method offers an efficient and effective solution for ring artifact reduction in CXT.
• This technique enhances the reliability of CXT for analyzing rotating or heterogeneous samples.
• The approach is versatile and applicable across different CXT setups and sample types.