In-room imaging and MR planning

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.

original

corrected