CERN, European Organization for Nuclear Research, Geneva, Switzerland.
Institut of Radiation Physics, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
Sci Rep. 2020 Oct 30;10(1):18754. doi: 10.1038/s41598-020-75257-5.
We used the Timepix3 hybrid pixel detector technology in order to determine the exposure of medical personnel to ionizing radiation in an interventional radiology room. We measured the energy spectra of the scattered radiation generated by the patient during X-ray image-guided interventional procedures. We performed measurements at different positions and heights within the theatre. We first observed a difference in fluence for each staff member. As expected, we found that the person closest to the X-ray tube is the most exposed while the least exposed staff member is positioned at the patient's feet. Additionally, we observed a shift in energy from head to toe for practitioners, clearly indicating a non-homogenous energy exposure. The photon counting Timepix3 detector provides a new tool for radiation field characterisation that is easier-to-use and more compact than conventional X-ray spectrometers. The spectral information is particularly valuable for optimising the use of radiation protection gear and improving dosimetry surveillance programs. We also found the device very useful for training purposes to provide awareness and understanding about radiation protection principles among interventional radiology staff.
我们使用 Timepix3 混合像素探测器技术，以确定介入放射学室内医务人员所受到的电离辐射暴露量。我们测量了在 X 射线图像引导介入手术过程中患者产生的散射辐射的能谱。我们在手术室的不同位置和高度进行了测量。我们首先观察到每个工作人员的剂量率存在差异。正如预期的那样，我们发现离 X 射线管最近的人受到的辐射最大，而位于患者脚部的工作人员受到的辐射最小。此外，我们观察到对于医护人员来说，能量从头部到脚部发生了转移，这清楚地表明了非均匀的能量暴露。光子计数 Timepix3 探测器提供了一种新的辐射场特征化工具，与传统的 X 射线光谱仪相比，它更易于使用且更紧凑。光谱信息对于优化辐射防护设备的使用和改进剂量监测计划特别有价值。我们还发现该设备对于培训目的非常有用，可以提高介入放射科工作人员对辐射防护原则的认识和理解。
