Accurate distortion correction scheme for digital subtraction angiography

Haiying Liu, Hsiang Hsiung

Research output: Contribution to journalConference articlepeer-review

Abstract

Robust geometric distortion characterization and correction methods have been developed and validated for DSA application. A compact as well as efficient numerical parameterization technique has been used for characterizing the 3D geometric image distortion of a clinical DSA system. To some extent, the 3rd order polynomial was found to be sufficient for the parameterization of global image distortion for all rotational angles. One of the advantages of the new technique is compact in the sense that it does not require a large distortion parameter look-up table. The new method promises a potential of using less regular distributed calibration points for a complete 3D image distortion characterization of DSA system. Furthermore, two different schemes based on the pixel mapping for correcting image distortion have been successfully demonstrated yielding satisfactory results.

Original languageEnglish (US)
Pages (from-to)78-85
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3460
DOIs
StatePublished - 1998
EventApplications of Digital Image Processing XXI - San Diego, CA, United States
Duration: Jul 21 1998Jul 24 1998

Keywords

  • Angiography
  • Convolution
  • DSA
  • Geometric distortion
  • Image correction
  • Interpolation

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