The Dose from Secondary Neutrons during the Operation of Modern Medical Accelerators
- Authors: Belousov A.V.1, Varzar S.M.1, Zheltonozhskaya M.V.1, Lykova E.N.1,2, Chernyaev A.P.1,2
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Affiliations:
- Department of Physics
- Skobeltsyn Institute of Nuclear Physics
- Issue: Vol 74, No 6 (2019)
- Pages: 551-558
- Section: Physics of Nuclei and Elementary Particles (Review)
- URL: https://journals.rcsi.science/0027-1349/article/view/165198
- DOI: https://doi.org/10.3103/S0027134919060080
- ID: 165198
Cite item
Abstract
A review of the experiments performed to date and calculations on the study of doses from secondary neutrons during the operation of medical electron accelerators of various manufacturers is presented. The fundamental differences between the heads of the three largest manufacturers (Varian, Elekta, and Siemens) are given. This article contains data on flux densities and doses for different accelerator models and operating modes. The data analysis showed that the dose from secondary neutrons when irradiating patients on a linear medical accelerator with bremsstrahlung should be taken into account, since its contribution can reach 2.04% at a maximum energy of up to 24 MeV. The contribution to the absorbed dose of secondary neutron fluxes must be evaluated when planning radiation therapy; all other things being equal, it is also necessary to choose modes of operation with the lowest rated energy for treating patients.
About the authors
A. V. Belousov
Department of Physics
Author for correspondence.
Email: belousovav@physics.msu.ru
Russian Federation, Moscow, 119991
S. M. Varzar
Department of Physics
Author for correspondence.
Email: varzar@physics.msu.ru
Russian Federation, Moscow, 119991
M. V. Zheltonozhskaya
Department of Physics
Author for correspondence.
Email: zhelton@yandex.ru
Russian Federation, Moscow, 119991
E. N. Lykova
Department of Physics; Skobeltsyn Institute of Nuclear Physics
Author for correspondence.
Email: iv-kate@yandex.ru
Russian Federation, Moscow, 119991; Moscow, 119991
A. P. Chernyaev
Department of Physics; Skobeltsyn Institute of Nuclear Physics
Author for correspondence.
Email: a.p.chernyaev@yandex.ru
Russian Federation, Moscow, 119991; Moscow, 119991