26. 与心脏受到的高剂量辐射有关的心血管病发病风险有所增加，这可能是在放疗过程中引起的，尽管降低心脏受辐射量的新治疗技术已经大大减少了这种风险。到目前为止，关于可致命心血管病和剂量低于约 1-2 戈瑞（Gy）的辐射照射之间存在关联的证据仅仅来自对日本原子弹爆炸幸存者数据的分析。其他研究没有提供明显或相一致的证据表明剂量低于约 1-2 Gy 的辐射有诱发心血管病的风险。委员会断定，总的来说，并没有足够的数据来确定有关这些极端的恰当风险模式。目前也没有足够的科学数据可以得出结论，认为在剂量低于 1-2Gy 的电离辐射照射和心血管病的发生率之间存在着因果关系。
26. There is an increased risk of cardiovascular disease associated with high radiation doses to the heart, which may be incurred during radiotherapy, although newer treatment techniques resulting in lower cardiac doses have reduced the risk substantially. To date, the evidence for an association between fatal cardiovascular disease and radiation exposure at doses in the range of less than about 1-2 gray (Gy) comes only from the analysis of the data on the Japanese atomic bombing survivors. Other studies provide no clear or consistent evidence of a risk of cardiovascular diseases for radiation doses of less than about 1-2 Gy. The Committee judges that, overall, the data are not sufficient to determine appropriate risk models for these end points. The scientific data are also not at present sufficient to conclude that there is a causal relationship between exposure to ionizing radiation and the incidence of cardiovascular disease for doses of less than about 1-2 Gy.