辐射具有两面性,既是人类多种癌症的诱导物,又是常用的治癌方法。它是细胞毒剂中唯一可以精确指明给予细胞或细胞内精确剂量的。本文目的在于探讨不同类型辐射所致细胞的死亡或亚死亡剂量和效应间的关系,以及如何应用它们来研究细胞水平的放射损伤机理。辐射致癌是一个复杂而又漫长的过程,从早期的理化变化到多年后与诱发癌症有关的生物学后遗症。一、辐射剂量与辐射危险剂量-效应关系是复杂的,因其固有的不确定性,特别是当低水平时,估计危险度是困 Radiation has two sides, it is not only an inducer of many kinds of human cancers, but also a common method for cancer treatment. It is the only cytotoxic agent that can accurately indicate the precise dose to be administered to a cell or cell. The purpose of this article is to investigate the relationship between doses and effects of death or sub-deaths of cells caused by different types of radiation, and how to use them to study the cellular level of radiation damage mechanisms. Radiation oncogenesis is a complex and lengthy process, from early physicochemical changes to biological sequelae associated with the induction of cancer over many years. 1. The dose-effect relationship between radiation dose and radiation risk is complex because of its inherent uncertainty, especially when the level is low, the estimated risk is