A residual correction method for iterative reconstruction with inaccurate system model

Lin Fu, Jinyi Qi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

The quality of images produced by iterative image reconstruction methods is directly affected by the accuracy of the system model being used. Although the system response of an imaging system can be computed or measured with high accuracy, practical constraints on computation cost ofien force the adoption of various approximations to the system model to obtain a computationally efficient system matrix. These approximations inevitably cause artifacts in reconstructed image. In this work we propose a residual correction method for iterative reconstruction to reduce reconstruction artifact caused by the model inaccuracies. Unlike conventional iterative methods which assume that the system matrix is accurate, the proposed method reconstructs an initial image with an approximate system model and then corrects for the reconstruction artifacts by introducing a data correction term to compensate for the model inaccuracies. Computer simulation showed that the proposed method can significantly improve image quality in terms of objective function value compared to approximate algorithms, while it is computationally more efficient than the conventional method that uses the accurate system model at every iteration.

Original languageEnglish (US)
Title of host publication2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, Proceedings, ISBI
Pages1311-1314
Number of pages4
DOIs
StatePublished - 2008
Event2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI - Paris, France
Duration: May 14 2008May 17 2008

Other

Other2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, ISBI
CountryFrance
CityParis
Period5/14/085/17/08

Keywords

  • Artifact correction
  • Error propagation
  • Iterative reconstruction
  • System matrix

ASJC Scopus subject areas

  • Biomedical Engineering

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  • Cite this

    Fu, L., & Qi, J. (2008). A residual correction method for iterative reconstruction with inaccurate system model. In 2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro, Proceedings, ISBI (pp. 1311-1314). [4541245] https://doi.org/10.1109/ISBI.2008.4541245