A new approach for CT image reconstruction with asymmetric configuration

Lifeng Yu, Xiaochuan Pan, Charles A. Pelizzari, Patrick J. La Rivière, Tinsu Pan

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We developed a novel algorithm for image reconstruction from fan-beam data acquired with asymmetric flat-panel detectors. This new algorithm can improve the noise properties of the widely used fan-beam filtered-backprojection (FFBP) algorithm by eliminating the spatially-variant weighting factor while retaining FFBP's favorable resolution properties. Quantitative results verify the theoretical prediction of the improved noise properties. These improved noise properties can be translated into a reduction of radiation dose. The new algorithm is particularly robust and useful when applied to CT systems with large field of measurement (FOM) and/or relatively small focal lengths.

Original languageEnglish (US)
Pages (from-to)1911-1917
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5032 III
StatePublished - 2003
EventMedical Imaging 2003: Image Processing - San Diego, CA, United States
Duration: Feb 17 2003Feb 20 2003


  • Computed tomography
  • Image reconstruction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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