No appropriate systems for the collection of relevant scientific data existed in many countries, nor was patients' exposure to medical radiation always adequately monitored, although its use was on the rise.
45. 许多国家都没有收集相关科学数据的适当系统，病人接触医疗辐射总也得不到充分的监测，尽管医疗辐射的应用越来越多。