Koenig A M, Maas J, Viniol S, Etzel R, Fiebich M, Thomas R P, Mahnken A H
Philipps-University of Marburg, Clinic of Diagnostic and Interventional Radiology, University Hospital Marburg, Germany.
Philipps-University of Marburg, Clinic of Diagnostic and Interventional Radiology, University Hospital Marburg, Germany.
Eur J Radiol. 2020 Nov;132:109245. doi: 10.1016/j.ejrad.2020.109245. Epub 2020 Sep 6.
Radiation-absorbing pads are an additional possibility to reduce scattered radiation at its source. The goal of this study is to investigate the efficacy of a new reusable radiation-absorbing pad at its origin in an experimental setup.
All measurements were carried out using a clinical angiography system with a standardized fluoroscopy protocol, different C-arm angulations and an anthropomorphic torso phantom as a scattering body. An ionization chamber was used to measure the radiation exposure at five different heights of a simulated operator during a simulated transfemoral angiography intervention. Measurements were carried out with and without radiation-absorbing pads with lead equivalents of 0.25 and 0.5 mm placed onto the scattering body. For all measurements a mobile acrylic shield and an under-table lead curtain was used.
At all operator heights from 100 to 165 cm a significant radiation dose reduction of up to 80.6 % (p < 0.01) using the radiation-absorbing pad was measured, when compared to no radiation-absorbing pad. At the height of 165 cm the radiation-absorbing pad with a lead equivalence of 0.5 mm showed a significant radiation dose reduction (51.4 %, p < 0.01) in comparison to a lead equivalence of 0.25 mm.
The addition of a radiation-absorbing pad to the standard protection means results in a significant dose reduction for the operator, particularly for upper body parts.
辐射吸收垫是从源头上减少散射辐射的另一种方法。本研究的目的是在实验装置中研究一种新型可重复使用的辐射吸收垫在其源头的有效性。
所有测量均使用临床血管造影系统，采用标准化的透视协议、不同的C形臂角度，并使用人体躯干模型作为散射体。在模拟经股动脉血管造影介入过程中，使用电离室测量模拟操作员在五个不同高度处的辐射暴露。在散射体上放置铅当量为0.25和0.5毫米的辐射吸收垫和不放置辐射吸收垫的情况下进行测量。所有测量均使用移动丙烯酸屏蔽和床下铅帘。
与不使用辐射吸收垫相比，在100至165厘米的所有操作员高度处，使用辐射吸收垫可显著降低辐射剂量，最高可达80.6%（p < 0.01）。在165厘米高度处，铅当量为0.5毫米的辐射吸收垫与铅当量为0.25毫米的辐射吸收垫相比，辐射剂量显著降低（51.4%，p < 0.01）。
在标准防护措施中增加辐射吸收垫可显著降低操作员的剂量，尤其是上身部位。
