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1. Highlight those aspects of beam modelling on treatment planning systems
(TPS) that play major role on the accuracy of dose in plans comprising of small
MV photon beams:
1. finite size of beam source (also referred to as
focal spot
)
2. jaw and MLC leaf edges
3. resolution: influence of voxels size (calculation grid)
4. Inhomogeneities
2. Review implementations on modern treatment planning systems (TPS)
Learning objectives