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Robust beam arrangement
➢
dose homogeneity:
choose beam
angles avoiding
large
density
interfaces
along the beam axis
➢
range uncertainty:
avoid
placing
Bragg peaks proximal to
critical
OARs
o
beam incidence parallel to OARs
o
spot positioning margins/restrictions
around OARs
Ammazalorso et al. Radiat Oncol 9 (2014)