目前 ,医用Ｘ射线仍是人类接受人工电离辐射的主要来源 ,也是当前基层放射防护工作的重点之一 ,为了解总结基层医用Ｘ射线机的防护状况变化 ,本文将 1999年滕州市医用Ｘ射线机放射防护情况与 1980年进行了对照分析。1　调查内容与方法1 1　调查对象　以 1980年滕州市医用Ｘ射线 At present, medical X-rays are still the main source of artificial ionizing radiation received by humans, and it is also one of the focuses of current radiation protection at the grassroots level. To understand and summarize the changes in the protective status of medical X-ray machines at the primary level, this article will be a medical X-ray machine in 1999 in Tengzhou City. The radiological protection situation was compared with that of 1980. 1 Investigation Contents and Methods 1 1 Survey Targets Medical X-rays of Tengzhou City in 1980