Inaba Yohei, Nakamura Masaaki, Chida Koichi, Zuguchi Masayuki
Department of Radiological Technology, Faculty of Medicine, Tohoku University School of Health Sciences, Seiryo-machi 2-1, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
Department of Radiation Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, Aramaki Aza-Aoba 468-1, Aoba-ku, Sendai, Miyagi, 980-0845, Japan.
Radiol Phys Technol. 2018 Dec;11(4):445-450. doi: 10.1007/s12194-018-0484-z. Epub 2018 Oct 10.
Radiation dose management is important in interventional radiology (IR) procedures, such as percutaneous coronary intervention, to prevent radiation-induced injuries. Therefore, radiation dose should be monitored in real time during IR. This study evaluated the fundamental characteristics of a novel real-time skin dosimeter (RTSD) developed at our institution. In addition, we compared the performance of our new and old radiation sensors and that of a skin dose monitor (SDM), with ion chamber reference values. We evaluated the fundamental characteristics (e.g., energy dependence, dose dependence, and angular dependence) of the RTSD developed by us in the diagnostic X-ray energy range. The performance of our RTSD was similar to that of the SDM. In particular, the new radiation sensor of our RTSD demonstrated better dose rate dependence compared to the old sensor. In addition, the new sensor had the advantage of being small in size and thus minimally affecting the X-ray images compared to the old sensor. Therefore, the developed skin dosimeter and radiation sensor may be useful in real-time measurement of patients' exposure to and multi-channel monitoring of radiation in IR procedures. The new dosimeter system can be recommended for visualization and management of the radiation dose to which the patients' skin is exposed.
在诸如经皮冠状动脉介入治疗等介入放射学（IR）程序中，辐射剂量管理对于预防辐射所致损伤非常重要。因此，在介入放射学过程中应实时监测辐射剂量。本研究评估了我们机构研发的一种新型实时皮肤剂量仪（RTSD）的基本特性。此外，我们将新、旧辐射传感器以及一种皮肤剂量监测仪（SDM）的性能与电离室参考值进行了比较。我们在诊断X射线能量范围内评估了我们研发的RTSD的基本特性（如能量依赖性、剂量依赖性和角度依赖性）。我们的RTSD的性能与SDM相似。特别是，我们RTSD的新型辐射传感器与旧传感器相比，显示出更好的剂量率依赖性。此外，与旧传感器相比，新型传感器具有尺寸小的优点，因此对X射线图像的影响最小。因此，研发的皮肤剂量仪和辐射传感器可能有助于在介入放射学程序中实时测量患者的辐射暴露并进行多通道辐射监测。新的剂量仪系统可推荐用于可视化和管理患者皮肤所接受的辐射剂量。
