Neutron contamination in radiotherapy processes: a review study
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Updated: Oct 22, 2025

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
Nooshin Banaee1, Kiarash Goodarzi2, Hassan Ali Nedaie3
1Medical Radiation Research Center, Central Tehran Branch, Islamic Azad University, Tehran 1469669191, Iran.
Abstract:
Using high-energy photon beams is one of the most practical methods in radiotherapy treatment of cases in deep site located tumors. In such treatments, neutron contamination induced through photoneutron interaction of high energy photons (>8 MeV) with high Z materials of LINAC structures is the most crucial issue which should be considered. Generated neutrons will affect shielding calculations and cause extra doses to the patient and the probability of increase induced secondary cancer risks. In this study, different parameters of neutron production in radiotherapy processes will be reviewed.
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