The influence of tertiary x-radiation on the radiological staff is widely unknown. Tertiary radiation is caused as the scattered radiation of the patient impacts the walls, floor, ceiling and surrounding air. The question that arises is does tertiary x-radiation provide a relevant contribution to the staff doses. The impact of tertiary radiation was investigated by means of measurements of the personal dose equivalent Hp(10) on an anthropomorphic Alderson Rando male phantom and also on operators/assistants staying in clinical practice. Further, the protective effect of lead foils, especially under tertiary radiation was also investigated. Correlations could be derived for clinical angiographic/interventional procedures between dose area products (DAPs) and dose length products (DLPs) vs. dorsal doses of staff persons. Generally, the staff doses that are a result of tertiary radiation depend on the x-ray energy and range from 0.15 to 0.55% of the scattered radiation impact caused by irradiation of the patient. Hence, a back panel with 0.125-mm lead equivalent is sufficient to protect the staff from tertiary radiation created within the room environment.

中文翻译：

---

三级 X 辐射——员工保护问题？

三次 X 射线对放射科工作人员的影响广为人知。三次辐射是由于患者的散射辐射影响墙壁、地板、天花板和周围空气而引起的。出现的问题是三次 X 射线对工作人员剂量是否有相关贡献​​。通过测量个人剂量当量 Hp(10) 对拟人 Alderson Rando 男性幻影以及对留在临床实践中的操作员/助理的影响，研究了三次辐射的影响。此外，还研究了铅箔的保护作用，尤其是在三次辐射下。可以推导出剂量面积乘积 (DAP) 和剂量长度乘积 (DLP) 与工作人员背侧剂量之间的临床血管造影/介入程序的相关性。一般来说，由三次辐射引起的工作人员剂量取决于 X 射线能量，范围为患者辐照造成的散射辐射影响的 0.15% 至 0.55%。因此，具有 0.125 毫米铅当量的背板足以保护工作人员免受房间环境中产生的三次辐射。