Particle Therapy 2017

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Photon RT

Neutron RT

Equal growth delay

RBE =

D(neutron)

D(photon)

Variety of tumors

Variety of RBE-values

Tumor RBE-values

generally higher than

the 3.0-3.5 value,

measured for normal

tissues

ACC RBE-values ≈ 8

Batterman et al. Eur. J. Cancer 17: 539-548; 1981