| Wang Hongkai,Tian Yuan,Dai Jianrong.Comparative analysis of radiation protection standards for medical linear accelerators in China and other typical countries[J].Chinese Journal of Radiological Medicine and Protection,2025,45(2):137-141 |
| Comparative analysis of radiation protection standards for medical linear accelerators in China and other typical countries |
| Received:June 26, 2024 |
| DOI：10.3760/cma.j.cn112271-20240626-00242 |
| KeyWords:Radiation protection Standard Linear accelerator Instantaneous dose rate |
| FundProject: |
| Author Name | Affiliation | E-mail | | Wang Hongkai | National Cancer Center/National Clinical Research Center for Cancer/Department of Radiation Oncology, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China | | | Tian Yuan | National Cancer Center/National Clinical Research Center for Cancer/Department of Radiation Oncology, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China | yuan.tian@cicams.ac.cn | | Dai Jianrong | National Cancer Center/National Clinical Research Center for Cancer/Department of Radiation Oncology, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China | |
|
| Hits: 2269 |
| Download times: 869 |
| Abstract:: |
| This study investigated international standard systems for radiotherapy, focusing on the comparison of the radiation protection standards for medical linear accelerators adopted in China, the UK, and the USA. Despite some specific differences, the standards for radiotherapy rooms in the three countries generally adhere to the basic principles set by the International Commission on Radiological Protection (ICRP) and the International Atomic Energy Agency (IAEA). Regarding the zoning principle of radiotherapy rooms, the definitions of the controlled areas are similar in China, the UK, and the USA, while the classification of areas beyond the controlled areas differs across the three countries. In terms of measurement conditions, all the three countries require measurements under the maximum output dose of the radiotherapy equipment, with only minor differences in details. For dose limits and compliance criteria for radiation shielding of radiotherapy rooms, China adopts the highest instantaneous dose rate as the control threshold. In contrast, the UK and the USA base their standards on dose limits evaluated over certain time intervals (annual, weekly, and daily), assessing compliance through workload calculation. In terms of method for deducing and calculating effective dose limits, UK standards stipulate that annual personnel exposure should be calculated using instantaneous dose rates. In comparison, the USA provides specific method for calculating dose rates per week and any one hour from instantaneous dose rates. The comparative analysis indicates that China's method, which is based on the maximum instantaneous dose rates, may lead to increased construction costs of radiotherapy rooms under the same conditions, hindering the application and development of novel radiotherapy technologies. To address these concerns while maintaining radiation safety, it is recommended that China consider introducing method based on average instantaneous dose rates or calculating the annual personnel exposure doses. This will help optimize protection standards and advance radiotherapy technology. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
