Physics Bucharest 2017
Beam Modifiers
Most of the calculation time of a MCTP system is spent in the jaws and MLC (when tracking photons and electrons through high-Z materials many particles are lost, so it requires a lot of CPU time to obtain sufficient particles that manage to cross these parts) To avoid waste of CPU time on photons and electrons tracking through MLC and other collimating devices approximations are introduced Chen et al (2000): MCDOSE Ray-tracing based method for calculating transmission through MLC geometry (only works with virtual source model)
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