Secondary Neutron and Photon Dose in Proton Therapy

Abstract Background and purpose : The dose due to secondary neutrons and photons in proton therapy was estimated with Monte Carlo simulations. Three existing facilities treating eye and deep-seated tumours were taken into account. The results of the calculations related to eye proton therapy were verified with measurements. Materials and methods : The simulations were performed with the FLUKA code. Neutron fluence was measured inside an Alderson phantom (type ART) with activation techniques. Results : The maximum dose due to secondaries produced in a passive beam delivery system was estimated to be of the order of 10 −4 and 10 −2 Gy per therapy Gy for eye and deep tumour treatments, respectively. In the case of irradiations of deep-seated tumours carried out with an active system, the dose was of the order of 10 −3 Gy per therapy Gy. Conclusions : The dose due to secondaries depends on the geometry of the beam delivery system and on the energy of the primary beam and is lower in the healthy tissues distant from the target volume

Comprehensive study of the reactions induced by 12C on 103Rh up to 33 MeV/nucleon

Abstract Fifty-three excitation functions for the production of radioactive residues in the interaction of 12C with 103Rh have been measured from the Coulomb barrier up to 400 MeV by means of the activation technique. These excitation functions have been analyzed considering complete fusion, incomplete fusion of 8Be and α-particle fragments and, above about 200 MeV, the transfer of either one proton or one neutron from 12C to 103Rh. The emission of pre-equilibrium particles during the thermalization of the excited composite nuclei formed in all these processes and, in the case of 8Be and α incomplete fusion, also the re-emission of α-particles after a mean-field interaction or a few interactions with the target nucleons have been taken into account

A New Method for N.C.A. Copper-64 Production.

Abstract not availableJRC.I-Institute for Health and Consumer Protection (Ispra

Thin-Target Excitation Functions and Optimization of NCA 64-Cu and 66,67-Ga Production by Deuteron Induced Nuclear Reactions on Natural Zinc Target, for Radiometabolic Therapy and for PET.

Abstract not availableJRC.I-Institute for Health and Consumer Protection (Ispra

Thin-Target Excitation Functions and Optimisation of NCA 64Cu and 66,67Ga Production by Deuteron Induced Nuclear Reactions on Natural Zinc Target, for Radiometabolic Therapy and for PET.

Abstract not availableJRC.I-Institute for Health and Consumer Protection (Ispra