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为促进Ｘ射线诊断的正确合理应用 ,推动搞好受检者防护 ,上海市根据全国统一安排[1] ,于 1999年对全市 1996、1998年Ｘ射线诊断医疗照射的年频率水平进行了调查。面上普查、分层抽样调查和典型调查均按“九五”期间全国医疗照射调查方案进行[2 ] 。1.上海市放射学服务基本状况
In order to promote the correct and reasonable application of X-ray diagnosis and promote the protection of the subjects, Shanghai Municipality investigated the annual frequency of X-ray diagnostic medical exposure in 1996 and 1998 according to the unified national arrangements [1]. Surveys on the surface, stratified sampling surveys and typical surveys were conducted according to the National Survey on Medical Exposure during the Ninth Five-Year Plan period [2]. 1. Shanghai radiology services basic situation