Neutron Influence in Charged Particle Therapy

In charged particle therapy, neutron will emit due to beam loss on accelerator components, beam shaping devices, treatment nozzle, and especially in the deposition of beam interactions in the patient. Those neutrons usually have high energy and strong penetrating power, so it will cause additional dose on the tumor and health tissue of the patient, which may influence the treatment effect. Thus it is essential to know the neutron influence in charged particle therapy.