title: Correction for beam hardening in computed tomography.
abstract: 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.
mesh_terms: D001834:Body Water; D001842:Bone and Bones; D006801:Humans; D008903:Minerals; D008962:Models, Theoretical; D011829:Radiation Dosage; D013223:Statistics as Topic; D014057:Tomography, X-Ray Computed
chemical_list: D008903:Minerals