FBP initialization for transition artifacts reduction in statistical X-ray CT reconstruction

Wojciech Zbijewski, Freek J. Beekman

Research output: Contribution to journalConference articlepeer-review

Abstract

When statistical reconstruction (SR) algorithms are applied to X-ray CT data, the resulting images may contain some disturbing streak artifacts emerging from high-contrast structures. Extremely high number of iterations needed to remove such disturbances may seriously slow down the reconstruction process. In this paper we demonstrate (using the Ordered Subsets Convex algorithm) that these artifacts can be adequately suppressed if statistical reconstruction is initialized with images generated by means of analytical algorithms like Filtered Back Projection (FBP). This allows the reconstruction time to be shortened by even as much as one order of magnitude. Although the initialization of the statistical algorithm with FBP image introduces some additional noise into the first iteration of OSC reconstruction, the resolution-noise trade-off and the contrast-to-noise ratio of final images are not markedly compromised.

Original languageEnglish (US)
Article numberM11-320
Pages (from-to)2970-2972
Number of pages3
JournalIEEE Nuclear Science Symposium Conference Record
Volume4
StatePublished - Dec 1 2003
Externally publishedYes
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003

Keywords

  • Artifact reduction
  • Imaging
  • Iterative reconstruction
  • Maximum likelihood
  • Tomography

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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