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X线诊断检查是人们受电离辐射照射的主要辐射源之一。根据UNSCEAR的报告,人们接受X线诊断检查的年剂量,全世界大约等于70天内受天然本底辐射照射的剂量,约为17mrem(1.7×10~(-4)Sv)。X线诊断检查应用及其检查频度,在发达国家和发展中国家之间是不同的。因此在不同地区人们受到的照射也就不同。
X-ray diagnostic tests are one of the main sources of radiation exposed to ionizing radiation. According to the UNSCEAR report, the annual dose of human diagnostic X-ray examination is about 17 mrem (1.7 × 10 -4 Sv) in the whole world, which is about equal to the dose of natural background radiation in 70 days. The application of X-ray diagnostic tests and the frequency of their examination are different between developed and developing countries. So people are exposed differently in different regions.