Calculation of shielding performance of CRT concrete for proton therapy and optimal shielding design of treatment delivery room.

Autor: Gao H; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Chen L; Department of Radiotherapy, The First Affiliated Hospital of Soochow University, Suzhou, 215123, China., Tang B; Shandong Center for Disease Control and Prevention, Jinan, 250014, China., Wang Y; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Du C; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Liu K; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Qiu D; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Kong X; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Yang B; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Yin Y; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Zhang W; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Tu Y; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China., Sun L; State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China; Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China. Electronic address: slhmz666@suda.edu.cn.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2022 Nov; Vol. 189, pp. 110432. Date of Electronic Publication: 2022 Aug 25.
DOI: 10.1016/j.apradiso.2022.110432
Abstrakt: Proton therapy is becoming increasingly popular worldwide, and its shielding must be considered. The cathode ray tube (CRT) material is a glass containing heavy metal elements, these materials have become a good choice for the production of radiation-proof concrete. In this study, the ability of concrete containing CRT fragments as shielding materials for proton therapy rooms is evaluated in terms of neutron shielding ability, neutron reflection ability, ambient dose equivalent rate, and induced radioactivity. In addition, this concrete is compared with commonly used ordinary concrete, boron-containing concrete, and barite concrete. The results show that with the increase of CRT content (10%-90%), the transmitted neutron fluence decreases continuously (5.06 × 10 -10 - 1.77 × 10 -10  cm -2 /particle), and the reflection of neutrons gradually increases (2.64 × 10 -9 - 3.20 × 10 -9  cm -2 /particle), resulting in an increased potential to patients. When 50% CRT concrete is used, the ambient dose equivalent rate is below 3.80 μSv/h/nA, and 90% CRT concrete is below 3.11 μSv/h/nA. The trend of radionuclide activity of induced radioactivity from 0 to 60 min after irradiation for concrete with different CRT contents is 2.74-5.38 × 10 -3 Bq/cm 3 , and the maximum photon fluence is 8.13 × 10 2  cm -2 . In conclusion, the optimization model of the three-layer shielding structure of ordinary concrete, high CRT content concrete, and boron-containing concrete is proposed with ambient dose equivalent rate less than 1.88 μSv/h/nA, minimizing the reflected neutrons to which the patient is exposed. This study shows the protection performance of CRT concrete is better than ordinary concrete and barite concrete.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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