Evaluation of radiation protection effectivity in a cardiac angiography room using visualized scattered radiation distribution.

IF 1.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Toshioh Fujibuchi, Misaki Nakashima, Hiroyuki Arakawa, Hitoshi Miyazaki, Choirul Anam
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Abstract

In this study, we devised a radiation protection tool specifically designed for healthcare professionals and students engaged in cardiac catheterization to easily monitor and evaluate scattered radiation distribution across diverse C-arm angles and arbitrary physician associated staff positions-scrub nurse and technologist positions. In this study, scattered radiation distributions in an angiography room were calculated using the Monte Carlo simulation of particle and heavy ion transport code system (PHITS) code. Four visualizations were performed under different C-arm angles with and without radiation protection: (1) a dose profile, (2) a 2D cross-section, (3) a 3D scattered radiation distribution, and (4) a 4D scattered radiation distribution. The simulation results detailing the scattered radiation distribution in PHITS were exported in Visualization Toolkit format and visualized through the open-source visualization application ParaView for analysis. Visualization of the scattered dose showed that dose distribution depends on the C-arm angle and the x-ray machine output parameters (kV, mAs s-1, beam filtration) which depend upon beam angulation to the patient body. When irradiating in the posterior-anterior direction, the protective curtain decreased the dose by 62% at a point 80 cm from the floor, where the physician's gonads are positioned. Placing the protection board close to the x-ray tube reduced the dose by 24% at a location 160 cm from the floor, where the lens of the eye is situated. Notably, positioning the protection board adjacent to the physician resulted in a 95.4% reduction in incident air kerma. These visualization displays can be combined to understand the spread and direction of the scattered radiation distribution and to determine where and how to operate and place radiation protection devices, accounting for the different beam angulations encountered in interventional cases. This study showed that scatter visualization could be a radiation protection teaching aid for students and medical staff in angiography rooms.

利用可视化散射辐射分布评估心脏血管造影室的辐射防护效果。
在这项研究中,我们设计了一种辐射防护工具,专为从事心导管检查的医护人员和学生设计,可轻松监测和评估不同 C 臂角度和任意医生相关人员位置(擦洗护士、技师位置)的散射辐射分布。在这项研究中,使用 PHITS 代码的蒙特卡罗模拟计算了血管造影室的散射辐射分布。在有辐射防护和无辐射防护的不同 C 臂角度下进行了四种可视化:1)剂量剖面图;2)二维截面图;3)三维散射辐射分布图;4)四维散射辐射分布图。PHITS 中散射辐射分布的模拟结果以可视化工具包(vtk)格式导出,并通过开源可视化应用程序 ParaView 进行可视化分析。散射剂量的可视化显示,剂量分布取决于 C 臂角度和 X 射线机输出参数(千伏、毫安/秒、光束过滤),而这些参数又取决于光束对患者身体的角度。在 PA 方向照射时,在距离地面 80 厘米处,即医生的生殖腺位置,保护帘可将剂量减少 62%。在距离地面 160 厘米的位置,也就是眼睛晶状体所在的位置,将保护板靠近 X 射线管可将剂量减少 24%。值得注意的是,将防护板放置在靠近医生的位置可使入射空气热玛减少 95.4%。结合这些可视化显示,可以了解散射辐射分布的扩散和方向,并确定在何处以及如何操作和放置辐射防护装置,同时考虑到介入病例中遇到的不同射束角度。这项研究表明,散射可视化可作为血管造影室学生和医务人员的辐射防护教学辅助工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Radiological Protection
Journal of Radiological Protection 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
2.60
自引率
26.70%
发文量
137
审稿时长
18-36 weeks
期刊介绍: Journal of Radiological Protection publishes articles on all aspects of radiological protection, including non-ionising as well as ionising radiations. Fields of interest range from research, development and theory to operational matters, education and training. The very wide spectrum of its topics includes: dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments. The journal encourages publication of data and code as well as results.
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