放射防护标准在历史上有过多次改变,辐射量及其单位也经历了不少演变。我国制定的“放射防护规定”,参考了国外标准。为便于了解和执行我国的放射防护标准,现把标准的沿革简单介绍如下。一、国外标准1895年伦琴(Roentgen)发现 X 射线以后,在察知电离辐射对人体有损害的同 Radiation protection standards have changed many times in history, and the amount of radiation and its units have undergone many evolutions. China’s “Radiation Protection Regulations”, with reference to foreign standards. In order to facilitate the understanding and implementation of our country’s radiation protection standards, the standard evolution is as follows. First, the foreign standards Roentgen discovered in 1895 X-ray, in the detection of ionizing radiation damage to the human body