Correction for beam hardening in computed tomography

Med Phys. 1978 May-Jun;5(3):209-14. doi: 10.1118/1.594429.


Corrections for beam-hardening artifacts in computed tomography can be made by using a model which assumes that water and bone mineral are the only constituents of tissue. With this model, a correction factor for the measured transmission values can be calculated such that the reconstructed attenuation coefficients have values corresponding to a monoenergetic source of known energy. Systematic errors in the uncorrected attenuation coefficients, which may be 5%, can be reduced to less than 1% if corrected transmission values are used.

Publication types

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

MeSH terms

  • Body Water
  • Bone and Bones
  • Humans
  • Minerals
  • Models, Theoretical
  • Radiation Dosage
  • Statistics as Topic
  • Tomography, X-Ray Computed*


  • Minerals