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一、前言医用辐射来源于医用诊断X线检查、牙科X线检查、核医学和放射治疗。在许多工业发达的国家,医用辐射已成为人类最大的辐射源,它可能接近、甚至超过天然本底辐射的贡献。分析全世界医用辐射频率及使用情况的最终目的是:(1)比较不同辐射外照射的来源;(2)找出出现问题的区域,提出降低辐射剂量的指导性建议;(3)查明全世界医疗费用的分布。联合国原子辐射效应科学委员会曾经出版过有关医用辐射使用情况的报告书,这些报告书的主要不足是医用辐射检查频率及分
I. Foreword Medical radiation comes from medical diagnostic X-ray examination, dental X-ray examination, nuclear medicine and radiation therapy. In many industrially developed countries, medical radiation has become the largest source of human radiation and it may be close to, or even surpass, the contribution of natural background radiation. The ultimate goal of analyzing the frequency and use of medical radiation throughout the world is to: (1) compare sources of external radiation with different exposures; (2) identify areas where problems occur and provide guidance for reducing radiation dose; (3) Distribution of medical costs in the world. The United Nations Scientific Committee on the Effects of Atomic Radiation has published reports on the use of medical radiation, the main shortcomings of these reports is the frequency of medical radiation tests and points