Radiation Protection Unit, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Phys Med. 2022 Aug;100:129-134. doi: 10.1016/j.ejmp.2022.06.021. Epub 2022 Jul 6.
Fluoroscopy guided interventional procedures guarantee high benefits for patients, but are associated with high levels of radiation exposure for the medical staff. Their increasing use and complexity results in even higher radiation exposures, with a risk to exceed the annual dose limit of 20 mSv for the eye lens. The aim of the study was to evaluate the potential dose reduction of eye lens exposure for lead glasses and for two types of visors (half and full), used by physicians performing interventional procedures.
Eye lens dose measurements were carried out on an anthropomorphic phantom simulating a physician performing a fluoroscopy guided interventional procedure. Dose reduction factors were calculated using high sensitivity thermoluminescent dosimeters. Moreover, a spatial dose distribution was generated for the two visors.
The dose reduction coefficient was found to be 1.6 for the glasses, 1.2 for the half visor and 4.5 for the full visor.
Optimal radiation protection requires a combination of different radiation protection equipment. Full visors that cover all the face of the operator are recommended, as they absorb scattered radiation reaching the eyes from all directions. Full visors should be prioritized over radiation protection glasses for cases where other protective equipment such as ceiling shielding cannot be used.
透视引导下的介入性操作可为患者带来显著获益，但医护人员会因此受到高强度的辐射。介入性操作的应用日益广泛且日趋复杂，这导致医护人员的辐射暴露水平甚至更高，存在超出眼部晶状体年剂量限值 20 mSv 的风险。本研究旨在评估在透视引导下进行介入性操作的医生使用铅眼镜和两种面罩（半面罩和全面罩）时，晶状体的潜在照射剂量降低情况。
在模拟医生进行透视引导下介入性操作的人体模型上进行晶状体剂量测量。使用高灵敏度热释光剂量计计算剂量降低系数。此外，还为两种面罩生成了空间剂量分布。
发现眼镜的剂量降低系数为 1.6，半面罩为 1.2，全面罩为 4.5。
最优的辐射防护需要结合使用不同的辐射防护设备。建议使用全面罩，全面罩可以覆盖操作人员的整个面部，吸收从各个方向到达眼睛的散射辐射。在无法使用天花板屏蔽等其他防护设备的情况下，应优先使用全面罩，而非射线防护眼镜。
