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Similar procedures (available in the literature from the 50’s) are used for
sampling randomly from the probability distributions for every process
involved in photon transport.
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MC is a statistical method to approximate dose at all points of a geometry
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The method inherently accounts for real sources, inhomogeneities, and
phantom dimensions according to input data.
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The collision KERMA can be calculated within voxels by scoring the
energy transferred to charged particles from interactions within the voxel
and weighing by voxel mass (dm=ρdV) (analogue MC).
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Alternatively, photon energy fluence can be scored in each voxel and
weighed by μen/ρ to obtain collision KERMA (track length estimator).
The MC method …