A general exact reconstruction for cone-beam CT via backprojection-filtration

IEEE Trans Med Imaging. 2005 Sep;24(9):1190-8. doi: 10.1109/TMI.2005.853626.

Abstract

In this paper, we prove a generalized backprojection-filtration formula for exact cone-beam image reconstruction with an arbitrary scanning locus. Our proof is independent of the shape of the scanning locus, as long as the object is contained in a region where there is a chord through any interior point. As special cases, this generalized formula can be applied with cone-beam scanning along nonstandard spiral and saddle curves, as well as in an n-PI window setting. The algorithmic implementation and numerical results are described to support the correctness of our general claim.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Algorithms*
  • Artificial Intelligence
  • Brain / diagnostic imaging*
  • Humans
  • Imaging, Three-Dimensional / methods*
  • Phantoms, Imaging
  • Radiographic Image Enhancement / methods
  • Radiographic Image Interpretation, Computer-Assisted / methods*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Tomography, Spiral Computed / instrumentation
  • Tomography, Spiral Computed / methods*