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Forming Mechanism and Correction of CT Image Artifacts Caused by the Errors of Three System Parameters

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  • Ming Chen
  • Gang Li

Abstract

We know that three system parameters, a center of X-ray source, an isocenter, and a center of linear detectors, are very difficult to be calibrated in industrial CT system. So there are often the offset of an isocenter and the deflection of linear detectors. When still using the FBP (filtered backprojection) algorithm under this condition, CT image artifacts will happen and then can seriously affect test results. In this paper, we give the appearances and forming mechanism of these artifacts and propose the reconstruction algorithm including a deflection angle of linear detectors. The numerical experiments with simulated data have validated that our propose algorithm can correct CT images artifacts without data rebinning.

Suggested Citation

  • Ming Chen & Gang Li, 2013. "Forming Mechanism and Correction of CT Image Artifacts Caused by the Errors of Three System Parameters," Journal of Applied Mathematics, Hindawi, vol. 2013, pages 1-7, April.
    • Handle: RePEc:hin:jnljam:545147
    DOI: 10.1155/2013/545147
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    Cited by:

    1. Jianguang Zhu & Kai Li & Binbin Hao, 2019. "Image Restoration by Second-Order Total Generalized Variation and Wavelet Frame Regularization," Complexity, Hindawi, vol. 2019, pages 1-16, March.

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