Reduction of ring artefacts in high resolution micro-CT reconstructions.

@article{Sijbers2004ReductionOR,
  title={Reduction of ring artefacts in high resolution micro-CT reconstructions.},
  author={Jan Sijbers and Andrei A. Postnov},
  journal={Physics in medicine and biology},
  year={2004},
  volume={49 14},
  pages={
          N247-53
        }
}
High resolution micro-CT images are often corrupted by ring artefacts, prohibiting quantitative analysis and hampering post processing. Removing or at least significantly reducing such artefacts is indispensable. However, since micro-CT systems are pushed to the extremes in the quest for the ultimate spatial resolution, ring artefacts can hardly be avoided. Moreover, as opposed to clinical CT systems, conventional correction schemes such as flat-field correction do not lead to satisfactory… Expand

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References

SHOWING 1-7 OF 7 REFERENCES
X-ray computed tomography for medical imaging
TLDR
The article looks at reconstruction in 2-D and 3-D tomography and examines the physical and mathematical concepts of the Radon (1917) transform, and the basic parallel beam reconstruction algorithms are discussed. Expand
X-ray microtomography scanner using time-delay integration for elimination of ring artefacts in the reconstructed image
Abstract Most X-ray microtomography scanners work on the same principle as third-generation medical CT scanners, that is, the same point in each projection is measured by the same detector element.Expand
A CCD-based optical CT scanner for high-resolution 3D imaging of radiation dose distributions: equipment specifications, optical simulations and preliminary results.
TLDR
A new OCT scanner based on a broad beam light source and a two-dimensional charge-coupled device (CCD) detector is described, showing that the non-uniform pixel sensitivity of the low-cost CCD detector used and the granularity of the diffuser screen lead to a serious ring artefact in the reconstructed images. Expand
X‐ray microtomography on beamline X at SSRL
This article describes a high‐resolution three‐dimensional CT system which has been tested on the new wiggler beamline X‐2 at the Stanford Synchrotron Radiation Laboratory. The present system is aExpand
An X-ray micro-tomography system optimised for the low-dose study of living organisms.
An X-ray micro-tomography system has been designed that is dedicated to the low-dose imaging of radiation sensitive living organisms and has been used to image the early development of the first fewExpand
Tutorial Introduction to X-ray Computed Microtomography Data Processing
  • Tutorial Introduction to X-ray Computed Microtomography Data Processing
  • 1998