Fundamental study of a real-time occupational dosimetry system for interventional radiology staff
Fundamental study of a real-time occupational dosimetry system for interventional radiology staff
复制标题
DOI：
10.1088/0952-4746/34/3/n65
复制
发表时间：
2014-09-01
影响因子：
1.5
通讯作者：
Zuguchi, Masayuki
中科院分区：
文献类型：
--
作者：
Inaba, Yohei;Chida, Koichi;Zuguchi, Masayuki
实时监测介入放射学（IR）工作人员所接受的辐射剂量已经变得非常可取。然而，职业剂量很少在真实的时间测量，由于缺乏一个可行的方法用于IR。最近，由RaySafe（TM）的i2系统已被引入到测量职业照射IR在真实的时间。i2系统由几个个人剂量计（PD）和一个带有显示器和计算机接口的基站组成。我们评估了i2系统的基本性能（剂量线性、剂量率依赖性、角度依赖性、批次均匀性和重现性）。i2的剂量线性非常好（R-2 = 1.00）。在非常高的剂量率（250 mGy h（-1））下，i2表现出轻微的剂量率依赖性（类似于20%）。在垂直或水平方向上，在0度和+/-45度之间观察到很小的角度依赖性（在20%以内）。我们还发现PD在其后面的角度（例如180度）处是高度敏感的（约200%）。然而，由于i2传感器（PD）放置在铅围裙上，通常这种反向散射辐射不是问题。我们的结论是，i2系统有利于准确的实时监测和管理的职业剂量在IR。
Real-time monitoring of the radiation doses received by interventional radiology (IR) staff has become highly desirable. However, occupational doses are rarely measured in real time, due to the lack of a feasible method for use in IR. Recently, the i2 system by RaySafe (TM) has been introduced to measure occupational exposure in IR in real time. The i2 system consists of several personal dosimeters (PDs) and a base station with a display and computer interfacing. We evaluated the fundamental performance (dose linearity, dose-rate dependence, angular dependence, batch uniformity and reproducibility) of the i2 system. The dose linearity of the i2 was excellent (R-2 = 1.00) The i2 exhibited slight dose-rate dependence (similar to 20%) at very high dose rates (250 mGy h(-1)). Little angular dependence (within 20%) was observed between 0 degrees and +/- 45 degrees, in either the vertical or horizontal direction. We also found that the PD was highly sensitive (about 200%) at angles behind it, e.g. 180 degrees. However, this backscattered radiation is not a problem, in general, due to the placement of the i2 sensor (PD) on the lead apron. We conclude that the i2 system facilitates accurate real-time monitoring and management of occupational doses during IR.