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… 

Figures from this paper

Ring artifact correction for high-resolution micro CT

This post-processing method reduced ring artifacts in the reconstructed images and improved image quality for phantom and in in vivo scans.

Removing ring artefacts in CT images via unidirectional relative variation model

CT images often have some ring artefacts caused by the inconsistent response of detector pixels and other factors. Removing ring artefacts effectively without impairing the image quality is still a

Compensation of ring artefacts in synchrotron tomographic images.

A simple but efficient method to eliminate such artefacts during the reconstruction of tomographic images by eliminating concentric rings around the center of rotation is proposed.

An improved method for ring artifacts removing in reconstructed tomographic images

Differences in the individual pixel response of detector elements introduce ring artifacts in tomographic images seriously degrading image quality. Removing or at least significantly reducing such

Ring artifacts reduction in cone-beam CT images based on independent component analysis

A method based on independent component analysis (ICA) is presented, which deals with the reconstructed CBCT image and can effectively reduce such ring artifacts.

Ring artefact reduction via multi-point piecewise linear flat field correction for X-ray computed tomography.

The cause of the subtle ring artefacts found in high-resolution XCT data is found to be due to inadequate flat field detector correction, so the usual two-point flat field correction is replaced by a multi-point, piecewise linear flat field Correction.

Comparison of ring artifact correction methods for flat-detector CT

A comparison of two dedicated ring artifact correction methods for flat-detector CT, on the basis of different median and mean filterings of the reconstructed image but each working in different geometric planes, finds both efficiently reduce ring artifacts in the reconstructed images and improve image quality.

Joint Reconstruction and Flat-Field Estimation using Support Estimation

This work proposes a novel method in the class of joint reconstruction and estimation algorithms, in which it simultaneously calculate a reconstruction and estimate a flat-field, and shows significant reduction of ring artefacts in both simulated and real data.

Ring artifact correction using detector line-ratios in computed tomography.

A novel method to reduce ring artifacts by calculating the ratio of adjacent detector elements in the projection data, termed the line-ratio, which estimates the sensitivity of each detector element and equalizes them in sinogram space and can be effectively removed from sinogram data.

Independent component analysis based ring artifact reduction in cone-beam CT images

  • Yenwei ChenGu Duan
  • Physics, Medicine
    2009 16th IEEE International Conference on Image Processing (ICIP)
  • 2009
A method based on independent component analysis (ICA) is presented, which deals with the reconstructed CBCT image and can effectively reduce such ring artifacts.
...

References

SHOWING 1-7 OF 7 REFERENCES

X-ray computed tomography for medical imaging

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.

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 a

An X-ray micro-tomography system optimised for the low-dose study of living organisms.

A CCD-based optical CT scanner for high-resolution 3D imaging of radiation dose distributions: equipment specifications, optical simulations and preliminary results.

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.

Tutorial Introduction to X-ray Computed Microtomography Data Processing

  • Tutorial Introduction to X-ray Computed Microtomography Data Processing
  • 1998