Image Calibration Techniques for Removing Cupping and Ring Artifacts in X-ray Micro-CT Images

Artifacts in X-ray CT

Artifacts in Spiral X-ray CT Scanners: Problems and Solutions

Artifact is one of the most important factors in degrading the CT image quality and plays an important role in diagnostic accuracy. In this paper, some artifacts typically appear in Spiral CT are introduced. The different factors such as patient, equipment and interpolation algorithm which cause the artifacts are discussed and new developments and image processing algorithms to prevent or reduc...

Artifacts in Spiral X-ray CT Scanners: Problems and Solutions

Artifact is one of the most important factors in degrading the CT image quality and plays an important role in diagnostic accuracy. In this paper, some artifacts typically appear in Spiral CT are introduced. The different factors such as patient, equipment and interpolation algorithm which cause the artifacts are discussed and new developments and image processing algorithms to prevent or reduc...

Reduction of Ring Artifacts in High Resolution X-Ray Microtomography Images

DAGM 2006, 28th Annual Symposium of the German Association for Pattern Recognition,12-14 September 2006, Berlin The images used for evaluation are 2D slices from a set of X-ray microtomography volume images of paper imaged at the European Synchrotron Radiation Facility (ESRF) in Grenoble. Both images with and without artifacts are present in the evaluation set. The results show that the method ...

Empirical cupping correction: a first-order raw data precorrection for cone-beam computed tomography.

We propose an empirical cupping correction (ECC) algorithm to correct for CT cupping artifacts that are induced by nonlinearities in the projection data. The method is raw data based, empirical, and requires neither knowledge of the x-ray spectrum nor of the attenuation coefficients. It aims at linearizing the attenuation data using a precorrection function of polynomial form. The coefficients ...