Dose Course 2018_Flipping book

Tilting cont...

Effects increase with – tilting angle, i.e. shorter SSD

- longer particle range, i.e. low density regions (lung) higher energies

larger fields (and off axis segments)

50 cm SSD

100 cm SSD

23

Sharpe & Battista 1993 MedPhys 20 pp 1685-94