目的掌握崇明县医用X射线诊断现状和医疗照射水平。方法按照上海市“十一五”期间医疗照射水平调查方案的要求,对崇明县X射线诊断医疗单位进行详细调查。结果2007年崇明县从事X射线诊断的单位共有34家,X射线诊断设备64台;平均每台服务10890.52人,其中CT机3台,平均每台服务232331人;牙科机5台;X线碎石机1台。2007年崇明县X射线诊断的医疗照射年频率为451.23人次/千人口,CT检查年频率为58.61人次/千人口,胸部摄影和胸部透视年频率分别为168.93人次/千人口和50.81人次/千人口。男性高于女性,男女比例为1.19:1;胸部摄影和胸部透视年频率二者比值为3.32。结论2007年崇明县X射线诊断年频率为451.23人次/千人口,已接近1998年上海市年频率;胸部透视年频率有降低的趋势;16～40岁年龄组的年频率明显高于其他年龄组,CT检查频率上升较快,值得引起重视。不同级别医院的X射线诊断年工作量差异较大。 Objective To grasp the status of medical X-ray diagnosis and medical irradiation in Chongming County. Methods According to the requirements of the investigation plan of medical irradiation level in Shanghai during the 11th Five-year Plan period, the X-ray diagnostic medical units in Chongming County were investigated in detail. Results In 2007, there were 34 X-ray diagnostic units in Chongming County and 64 sets of X-ray diagnostic equipment. The average service per serving was 10,890.52 persons, including 3 CT machines, with an average of 232,331 persons per serving; 5 dental units; Stone machine 1 Taiwan. In 2007, the annual frequency of medical exposure to X-ray diagnosis in Chongming County was 451.23 persons / person, the annual frequency of CT examination was 58.61 persons / person, the annual frequency of chest radiography and chest radiography were 168.93 persons / person and 50.81 persons / person respectively . Men than women, the male to female ratio was 1.19: 1; chest radiography and chest radiography annual frequency of both the ratio of 3.32. Conclusion The annual frequency of X-ray diagnosis in Chongming County in 2007 was 451.23 person-times per thousand population, which was close to the annual frequency of Shanghai in 1998. The annual frequency of chest fluoroscopy tended to decrease. The annual frequency of X-ray diagnosis was significantly higher in other age groups than in other age groups , CT examination frequency rose rapidly, it deserves attention. Different levels of hospital X-ray diagnosis of large differences in annual workload.