摘要
确定性效应是辐射事故中主要关心的健康危害。辐射事故照射,除大剂量急性照射情况外,更多的还有受照延续时间不等、照射水平不一的多次受照情况,甚至尚有数天内连续受照的。本文从辐射效应的“线性-平方”模型出发,借助目前已经掌握的确定性效应的剂量阈值,针对剂量的不同时间分布,集中探讨低LET辐射事故中评价确定性健康危害的剂量学方法。引用了分割照射和延续照射的外推剂量概念,提出了外推剂量可加原理和等外推剂量等效应原理。
Deterministic effect is principal health hazard of interest after radiation accident exposure Besides acute exposure of large dose, there are repeated exposures mainly in which exposure duration is unequal and dose levels heterogeneous, even exposure may continue for a couple of days. Based on the model of linear quadratic relationship of dose-response, dosimetric method for assessment of deterministic hazard of low LET radiation accident exposure in accordance with different time distribution of dose were developed in the paper by means of given thresholds of deterministic effects. The concept of extrapolated doses of the fractionated and the protracted exposure was quoted. The addition principle of extrapolated doses and iso-effect principle of isoextrapolated doses were also presented.
出处
《辐射防护》
CAS
CSCD
北大核心
2006年第1期12-16,23,共6页
Radiation Protection
关键词
辐射事故
确定性效应
线性·平方模型
外推剂量
外推剂量可加原理
等外推剂量等效
应原理
分割照射
Radiation Accident Exposure
Deterministic Effect
Linear-quadratic Relationship
Extrapolated Doses
Addition Principle of Extrapolated Doses
Iso-effect Principle of Iso-Extrapolated Doses
