AbstractObjective To discuss the design details of accelerator room for a novel enclosed O-ring linac Halcyon, and to optimize its protection and layout. Methods According to the optimization principle of radiation protection and the requirements of national radiation protection standards, and the structural characteristics of Halcyon accelerator, the differences between conventional and this novel accelerator rooms were analyzed by discussing the space layout of the machine room, shielding calculation, electrical facilities, purifying ventilation, temperature and humidity control and other factors. Results The Halcyon machine had a compact structure, a closed ring frame design and a main beam shielding device, which could greatly reduce the radiation protection pressure while improving the space utilization rate of the machine room. The optimized design layout of the machine room could eliminate hidden dangers, avoid design defects, and prevent adverse consequences caused by design errors. Conclusions The overall structure of Halcyon accelerator is different from that of conventional accelerators. The design details should be taken into full consideration to ensure the optimization of radiation protection, lay a good foundation for subsequent installation, debugging and operation of the equipment and create a good treatment environment for patients and medical staff.
[1] 胡逸民. 肿瘤放射物理学[M]. 北京:原子能出版社,1999. Hu YM. Tumor radiation physics[M]. Beijing:Atomic Energy Press,1999. [2] 邓小武. 放射治疗设备与技术[M]//邓小武. 实用临床放射肿瘤学. 广州:中山大学出版社,2005. Deng XW. Radiotherapy equipment and technology[M]// Deng XW. Practical clinical radiation oncology. Guangzhou:Sun Yat-sen University Press, 2005. [3] Cossairt JD, Quinn M. Radiation Protection Instrumentation at Accelerators[M]// Accelerator radiation physics for personnel and environmental protection. Boca Raton, Florida, USA:CRC Press, 2019. [4] Nguyen D, Pietri FJ, Sporea C, et al. 17 Patient Quality assurance of the new halcyon linear accelerator (Varian)[J]. Phys Med, 2018, 56:10-11. DOI :10.1016/j.ejmp.2018.09.030. [5] 中华人民共和国国家卫生和计划生育委员会. 电离辐射防护与辐射源安全基本标准:GB18871—2002[S].北京:中国标准出版社,2002:35-36. National Health and Family Planning Commission of the People's Republic of China. Basic standards for ionizing radiation protection and radiation source safety:GB18871-2002[S]. Beijing:China Standard Press, 2002:35-36. [6] 马永忠, 王时进, 娄云, 等. 关于《放射治疗机房的辐射屏蔽规范第2部分:电子直线加速器放射治疗机房》的解读[J]. 中国卫生标准管理, 2012(03):36-42. DOI :CNKI:SUN:WSBZ.0.2012-03-015. Ma YZ, Wang SJ, Lou Y, et al. Interpretation of Radiation Shielding Specifications for Radiotherapy Units Part 2:Electron Linear Accelerator Radiotherapy Units[J]. Chin Health Stand Manag, 2012(03):36-42. DOI :CNKI:SUN:WSBZ.0.2012-03-015. [7] 李海亮,梁红日,朱建国,等. 有用线束朝向迷路内墙的加速器机房辐射屏蔽计算[J]. 中华放射医学与防护杂志, 2013, 33(4):427-430. DOI :3760/cma.j.issn.0254-5098.2013.04.027. Li HL, Liang HR, Zhu JG, et al. Radiation shielding calculation for accelerator room with useful harness facing the labyrinth inner wall[J]. Chin J Radiol Med Protect, 2013, 33(4):427-430. DOI:3760/cma.j.issn.0254-5098.2013.04.027. [8] 郑亚琴康亚军褚薛刚,等. 剂量率参考控制水平对加速器屏蔽设计的影响[J]. 中华放射医学与防护杂志, 2015(35):141. DOI:10.3760/cma.j.issn.0254-5098.2015.02.015. Zheng YQ, Kang YJ, Chu XG, et al. The influence of dose rate reference control level on accelerator shielding design[J]. Chin J Radiol Med Protect, 2015(35):141. DOI :10.3760/cma.j.issn.0254-5098.2015.02.015. [9] None. NCRP Report 151 Structural shielding design and evaluation for megavoltage x-and gamma-ray radiotherapy facilities[J]. J Radiol Protect, 2006, 26(3):349-349. [10] 叶东矗, 焦盈盈. 医用直线加速器及其机房电气的设计[J]. 中国医学装备, 2018(8):150-151. DOI:10.3969/J. ISSN.1672-8270.2018.08.042. Ye DC, Jiao YY. Design of medical linear accelerator and its computer room electrical[J]. China Med Equip, 2018(8):150-151. DOI:10.3969/J. ISSN.1672-8270.2018.08.042. [11] 中华人民共和国国家卫生健康委员会. 工作场所有害因素职业接触限值第1部分:化学有害因素GBZ 2.1-2019[S].北京:中国标准出版社,2019:5-6. National Health Commission of the People's Republic of China. Occupational exposure limits for harmful factors in workplace Part 1:Chemical harmful factors GBZ 2.1-2019[S]. Beijing:China Standard Press, 2019:5-6. [12] Huang Y, Wu H, Hu Q, et al. Dose calculation deviations induced by fractional image-guided-couch-shifts for varian halcyon MV cone beam CT[J]. Phys Med, 2019, 58(1):66-71. DOI:10.1016/j.ejmp.2019.01.015. [13] Wang RX, Du Y, Yao KM, et al. Halcyon clinical performance evaluation:a log file-based study in comparison with a C-arm Linac[J]. Phys Med, 2020, 71(1):14-23. DOI:10.1016/j.ejmp.2020.01.023. [14] 唐木涛, 王修德, 李奇慧, 等. 医用加速器机房屏蔽设计与职业危害控制效果评价[J]. 医疗卫生装备, 2016, 37(11):40-43. DOI:10.7687/J. ISSN1003-8868.2016.11.040. Tang MT, Wang XD, Li QH, et al. Shielding design and occupational hazard control effect evaluation of medical accelerator room[J]. Med Heal Equip, 2016, 37(11):40-43. DOI:10.7687/J. ISSN1003-8868.2016.11.040.
2020, Vol. 29 
