摘要
EPR(电子顺磁共振)剂量测定方法是回顾性测定个人辐射剂量的主要方法,它能够准确估算出很久以前发生的辐射照射事件的吸收剂量值,其理论基础是在牙釉质中,辐射所致自由基水平随着辐射剂量的增加而增加。目前,将EPR方法用于低剂量测定还存在一些困难,为了降低测量阈值,减小误差,优化方法,需要进一步研究该方法的影响因素。本文重点分析了影响牙釉质EPR剂量方法测量阈值和测量结果不确定度的主要因素,并对解决这些问题的修正方法进行了讨论。
Effective dose assessment can be given even long after the irradiation exposure event by the method of EPR (electron paramagnetic resonance) dosimetry, which has been developed into a lead-ing method for retrospective dosimetry of individual radiation exposure. The principle of EPR dosimetry is based on the fact that the concentration of radiation-induced radicals increases with irradiation dose. There is still some difficulty in the measurement of low dose at present, so further investigation on the effect fac-tors of the method is required in order to lower measure threshold, decrease error and optimize the method. Several major effect factors of measurement threshold and result uncertainty in EPR dosimetry have been analyzed and the corresponding correction methods for the factors were proposed.
出处
《国外医学（放射医学核医学分册）》
2004年第3期128-132,共5页
Foreign Medical Sciences(Section of Radiation Medicine and Nuclear Medicine)
关键词
牙釉质
电子顺磁共振
辐射剂量
辐射监测
enamel
electron paramagnetic resonance
radiation dose
radiation monitoring
