Noto Kimiya, Sota Takumi, Koshida Kichiro, Suzuki Shouichi
Graduate School of Medical Science, Kanazawa University.
Nihon Hoshasen Gijutsu Gakkai Zasshi. 2003 Aug;59(8):976-83. doi: 10.6009/jjrt.kj00000921843.
Radiation is controlled by the recent revision of the Enforcement Regulations of the Medical Service Law. Law No. 188 prescribes X-ray data for estimating effective dose in the controlled area of a medical facility. For X-ray data such as kerma in air, transmission data are based on NCRP. We compared various X-ray data, and NCRP and Simpkin were compared with law No. 188. Leakage effective doses in a general-purpose radiography room, fluoroscopy room, and X-ray CT room were calculated. All three calculations were below the dose limit for controlled areas, 1.3 mSv/3 months. In the general-purpose radiography room (including fluoroscopy), NCRP and Simpkin underestimated from 1/3 to 1/2 in comparison with law No. 188. In the X-ray CT room, NCRP and Simpkin showed underestimates from 1/2 to 2/3 compared with law No. 188. There were no significant differences between law No. 188, NCRP, and Simpkin, but significant differences were found for individual numerical values. A need for the re-examination of basic data was suggested by the above findings.
辐射受《医疗服务法实施条例》最新修订的管控。第188号法律规定了用于估算医疗机构控制区内有效剂量的X射线数据。对于空气比释动能等X射线数据，传输数据以美国国家辐射防护与测量委员会（NCRP）为依据。我们比较了各种X射线数据，并将NCRP和辛普金（Simpkin）的数据与第188号法律进行了比较。计算了通用X射线摄影室、荧光透视室和X射线计算机断层扫描（CT）室的泄漏有效剂量。所有这三种计算结果均低于控制区的剂量限值，即1.3毫希沃特/3个月。在通用X射线摄影室（包括荧光透视）中，与第188号法律相比，NCRP和辛普金的数据低估了1/3至1/2。在X射线CT室中，与第188号法律相比，NCRP和辛普金的数据低估了1/2至2/3。第188号法律、NCRP和辛普金之间没有显著差异，但个别数值存在显著差异。上述结果表明有必要重新审视基础数据。
