Physics Bucharest 2017

Pencil Beam Approximation

 Irradiation field decomposed in thin pencil beams  Superposition of longitudinal pencil beam kernels in 2D (much faster since 2D integration)  Summation of individual narrow beams  Kernel creation by deconvolution of measurements (or MC)  Pencil beam kernel cannot be modified locally (i.e. for inhomogeneities), does not take the changes of lateral scattering effects into consideration

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