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Beam Hardening Artifacts
Common ways to correct for these artifacts consist in:
- Segmenting the metal or high attenuating objects in the image (which are the
main responsible of the artifacts, since the inhomogeneity in the absorption
due to the energy is maximum when highly attenuating objects are met).
- Identifying all the affected projections, i.e. those projections that have passed
throught these objects.
- Replacing the affected projection with some sort of interpolation of the non-
affected adjacent ones.
These types of algorithms are normally iterative: small improvements are done in
each iteration, until a cost function is minimized.
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