Particle Therapy 2017

LET [keV/µm] LET [keV/µm]

Belli et al. 1997; Weyrather et al.1999 Kilagua et al. 1978

1 10 100 1000

4

1

3

2

R

B

E

Entrance

SOBP front

SOBP center

SOBP distal

10-2 10-1 1 10 100 Protons : For a small volume within the distal part of a radiation field RBE increases throughout the SOBP I n t e g r a l d o s e d is tr i b u ti o 160 MeV protons, 10 cm SOBP

Particles: LET dependencies