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目的 估算梅州市医用诊断X射线集体剂量并掌握其分布状况。方法 卫生部制定的全国“九五”期间医疗照射调查方案。结果 在集体剂量中CT扫描剂量占集体剂量的比例最大 ,分别为 30 46 %和 34 5 7% ,其次为腰 (胸 )椎检查 ,两年分别为 2 6 92 %和 2 8 2 0 % ,胸透占第三位。结论 1996年、1998年总集体剂量分别为 1147 98man·Sv和 12 6 3 91man·Sv ,平均每人医疗诊断X射线剂量分别为 0 2 5mSv/人·a和 0 2 7mSv/人·a ,平均每次检查剂量分别为 2 6 0mSv/人次和 2 72mSv/人次
Objective To estimate the collective dose of medical diagnostic X-ray in Meizhou and to know its distribution. Methods The Ministry of Health formulated the national “Nine Five” period of medical exposure investigation program. Results The dose of CT scan in the collective dose accounted for the largest proportion of the total dose (30 46% and 34 57% respectively), followed by the lumbar (thoracic) vertebral examination, with the rates of 2692% and 2820% Thoracic third place. Conclusions In 1996 and 1998, the total collective doses were 1147 98man Sv and 12 6 3 91man Sv, respectively. The average medical diagnostic X-ray doses per person were respectively 254 mSv / person and 0 27 mSv / person · a, with an average of Each test dose was 260mSv / person and 2 72mSv / person