常用医疗诊断X射线机散漏射线剂量测量结果及讨论

Results and Discussions of the Dose Measurements of Scattering and Leaking Rays from Commonly Used Medical Diagnosis X-ray Machines.

目的 探讨X射线散漏射线对机房面积、设计参数的影响。方法 对 8台常用医疗诊断X射线机的散漏射线的分布进行了实地测量。结果 散漏射线的减弱规律约为指数率 ,主要与X射线机本身性能有关。结论 在防护设计中应综合考虑X射线机性能 ,土地的商品价值 ,潜在的受照人群分布等多种因素 ,以求满足最优化要求。

Objective To explore the influences of the scattering and leaking rays from X-ray machines on the area of the room of the machines installed and the design parameter. Methods Measurements of the distributions of scattering and leaking rays from eight types of medical diagnostic X-ray machines were made. Results The reduction of intensities of scattering and leaking rays obey approximately the index law and mainly depend on the performances of X-rays machine used. Conclusion The design of machine room should take such factors as the performance of the X-ray machine, the commodity value of the land and the distribution of people potentially affected, into potentially affected, into consideration in order to realize optimization of radiation protection.