论文部分内容阅读
本文讨论了医疗照射的频度、剂量水平和防护问题。诊断X线检查频度在发达国家为每年每千人300—900人次,在发展中国家为100—200人次/千人·年,我国为124.5人次/千人·年;平均有效剂量当量在发达国家为1mSv/年·人,全世界平均值为0.4mSv/年·人,我国为 0.5mSv/年·人;医疗照射所致超额死亡率在发达国家估计为10—15/百万人,我国为4.27/百万人。 我国的诊断X线检查频度和剂量水平将进一步增长,为减少医疗照射,我们必须采取预防措施。
This article discusses the frequency of medical exposure, dose levels, and protection issues. The frequency of diagnostic X-ray examinations is 300-900 person-times per year in developed countries, 100-200 person-times per 1,000 person-years in developing countries and 124.5 person-times per 1,000 person-years in developing countries. The average equivalent dose equivalent is between developed In the case of a country of 1 mSv / year, the average of the world population is 0.4 mSv / year and in our country is 0.5 mSv / year; the excess mortality rate due to medical exposure is estimated at 10-15 per million in developed countries. 4.27 per million. China’s diagnostic X-ray examination frequency and dose levels will further increase, in order to reduce medical exposure, we must take precautions.