Course book Advanced Treatment Planning 2018
Choice of optimal beam energy
4MV 6MV 8MV
≥18MV
10MV
15MV
Aspects
Cranial
▪ penetration depth ▪ dose delivered to normal tissue ▪ penumbra broadening
HN
Thorax
Pelvic
Higher energy in low density regions
▪ higher energies means larger penumbra due to increase in lateral electron transport (≥10MV) ▪ sufficiently accurate planning calculation algorithms are required for decisions on optimal beam energy
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