Modified Radon transform inversion using moments

Hayoung Choi, Victor Ginting, Farhad Jafari, Robert Mnatsakanov

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Moment methods to reconstruct images from their Radon transforms are both natural and useful. They can be used to suppress noise or other spurious effects and can lead to highly efficient reconstructions from relatively few projections. We establish a modified Radon transform (MRT) via convolution with a mollifier and obtain its inversion formula. The relationship of the moments of the Radon transform and the moments of its modified Radon transform is derived, and MRT data is used to provide a uniform approximation to the original density function. The reconstruction algorithm is implemented, and a simple density function is reconstructed from moments of its modified Radon transform. Numerical convergence of this reconstruction is shown to agree with the derived theoretical results.

Original languageEnglish (US)
Pages (from-to)1-15
Number of pages15
JournalJournal of Inverse and Ill-Posed Problems
Volume28
Issue number1
DOIs
StatePublished - Feb 1 2020
Externally publishedYes

Keywords

  • Radon transform
  • approximation
  • convolution
  • inverse problems
  • moment problems
  • tomography

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