Research Masterclass in Radiotherapy Physics 2017

Water or tissue equivalence phantom materials

w

  

 

? S z D zD   ) ( k fl   ph

 ) ( 

D

w w w

ph



ph

1.20

1.10

Stopping power ratio

0.70 (L/  ) w,g or (  /A) w,g 0.80 0.90 1.00

Emitted protons

Total non-elastic absorption

Emitted deuterons

Emitted alpha particles

0.60

0

50

100

150

200

250

proton energy / MeV