Complete Ring Artifacts Reduction Procedure for Lab-Based X-ray Nano CT Systems

Artifacts in X-ray CT

Laboratory X-Ray Nano-CT System

Using advanced X-ray technologies and X-ray scattering enhancement in signal detection, a compact laboratory X-ray scanner for 3D non-invasive imaging with 150-200 nanometers 3D detail detectability has been created. This spatial resolution in the volume terms is equal or better than can be achieved in synchrotron tomography, 5 orders better than in existing laboratory instruments and 10-12 ord...

Simultaneous Reduction in Noise and Cross-Contamination Artifacts for Dual-Energy X-Ray CT

PURPOSE Dual-energy CT imaging tends to suffer from much lower signal-to-noise ratio than single-energy CT. In this paper, we propose an improved anticorrelated noise reduction (ACNR) method without causing cross-contamination artifacts. METHODS The proposed algorithm diffuses both basis material density images (e.g., water and iodine) at the same time using a novel correlated diffusion algor...

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 ...

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...