Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (1): 1 doi: 10.1007/s41365-019-0712-1

• ACCELERATOR, RAY AND APPLICATIONS •     Next Articles

Radiation shielding design of a compact single-room proton therapy based on synchrotron

Jin-Long Wang 1 L. Alberto Cruz2 Qing-Biao Wu 3,4 Qiong Wang5 Yao Wei6 Hong-Kai Wang 7   

  1. 1 Guangzhou Concord Cancer Center, Guangzhou 510045, China
    2 University of Florida, Gainesville FL32611, US
    3 Institute of High Energy Physics, Chinese Academy of Science (CAS), Beijing 100049, China
    4 Spallation Neutron Source Science Center, Dongguan 523803, China
    5 National Supercomputing Center, Wuxi 210008, China
    6 Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
    7 Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 102400, China
  • Received:2019-08-29 Revised:2019-10-21 Accepted:2019-10-27
  • Contact: Hong-Kai Wang E-mail:wanghongkai@chinansc.cn
  • Supported by:
    This work is partially supported by the China Postdoctoral Science Foundation (No. 2019M650611).
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Jin-Long Wang, L. Alberto Cruz, Qing-Biao Wu, Qiong Wang, Yao Wei, Hong-Kai Wang. Radiation shielding design of a compact single-room proton therapy based on synchrotron.Nuclear Science and Techniques, 2020, 31(1): 1     doi: 10.1007/s41365-019-0712-1

Abstract: A synchrotron-based proton therapy (PT) facility that conforms with the requirement of future development trend in compact PT can be operated without an energy selection system. This article demonstrates a novel radiation shielding design for this purpose. Various FLUKA-based Monte Carlo simulations have been performed to validate its feasibility. In this design, two different shielding scenarios (3-m-thick concrete and 2-m-thick iron–concrete) are proven able to reduce the public annual dose to the limit of 0.1 mSv/year. The calculation result shows that the non-primary radiation from a PT system without an inner shielding wall complies with the IEC 60601-2-64 international standard, making a single room a reality. Moreover, the H/D value of this design decreases from 2.14 to 0.32 mSv/Gy when the distance ranges from 50 to 150 cm from the isocenter, which is consistent with the previous result from another study. By establishing a typical time schedule and procedures in a treatment day for a single room in the simulation, a non-urgent machine maintenance time of 10 min after treatment is recommended, and the residual radiation level in most areas can be reduced to 2.5 𝜇Sv/h. The annual dose for radiation therapists coming from the residual radiation is 1 mSv, which is 20% of the target design. In general, this shielding design ensures a low cost and compact facility compared with the cyclotron-based PT system.

Key words: Proton therapy, Radiation shielding, Monte Carlo, FLUKA