Course book Advanced Treatment Planning 2018

Protons

• PBT is harder to use than X-ray therapy • Full of uncertainties

• Proton beam therapy (PBT) can deliver ➢ Lower exit doses – ideal for children ➢ Possibly higher doses close to dose-limiting structures ▪ Used for skull base and spinal chordoma • Dose plans ‘less tolerant’ of variation in shape or density

➢

Needs consideration of robustness

• Careful comparison is needed