Department of Diagnostic and Interventional Radiology, Frankfurt-University Hospital, Theodor-Stern Kai 7, 60590 Frankfurt am Main, Germany.
Department of Diagnostic and Interventional Radiology, Frankfurt-University Hospital, Theodor-Stern Kai 7, 60590 Frankfurt am Main, Germany; Department of Diagnostic and Interventional Radiology, University Hospital Cologne, Kerpener Str. 62, 50937 Cologne, Germany.
Clin Radiol. 2024 Jun;79(6):e785-e790. doi: 10.1016/j.crad.2024.01.028. Epub 2024 Feb 15.
To evaluate if real-time dose visualisation during computed tomography (CT)-guided interventions leads to a reduction in radiation dose to participating radiologists.
The individual radiation dose radiologists are exposed to during CT interventions was measured using dedicated dosimeters (RaySafe i2-system, Unfors RaySafe GmbH, Billdal, Sweden) worn over the usual radiation protective apron. Initially, only the total radiation dose was measured, without visualisation (control group). In the following study period, the radiation dose was shown to participants on a live screen in real-time (experimental group). In both groups, the dose was recorded in 1-second intervals. The results collected were evaluated by comparison using descriptive statistics and mixed-effect models. In particular, the variables experience, gender, role, and position during the intervention were analysed.
In total, 517 measurements of 304 interventions (n=249 with and n=268 without live screen) performed by 29 radiologists acting as interventionalists or assistants were analysed. All CT-guided interventions were performed percutaneously, the majority of which (n=280) were microwave ablations (MWA). Radiation doses in the group without visualisation were comparable with usual dose rates for the corresponding intervention type. The mean total radiation dose was reduced by 58.1% (11.6 versus 4.86 μSv) in the experimental group (p=0.034). The highest reduction of 78.5% (15.55 versus 3.35 μSv) was observed in radiologists with the role of assistant (p=0.002). Sub-analysis showed significant dose reduction (p<0.0001) for the use of live screen in general; considering all variables, the role "assistant" alone had a statistically significant influence (p=0.002).
The real-time visualisation of active radiation dose during CT interventions leads to a relevant reduction in radiation dose to participating radiologists.
评估在 CT 引导介入过程中实时剂量可视化是否会降低参与放射科医生的辐射剂量。
使用专用剂量计（Unfors RaySafe i2 系统，Unfors RaySafe GmbH，瑞典比尔达尔）测量放射科医生在 CT 介入期间所接受的个体辐射剂量，这些剂量计戴在通常的辐射防护围裙上。最初，仅测量总辐射剂量（对照组），没有可视化。在接下来的研究期间，将实时将辐射剂量显示给参与者（实验组）。在这两组中，以 1 秒的间隔记录剂量。通过使用描述性统计和混合效应模型进行比较来评估收集到的结果。特别是，分析了经验、性别、角色和干预期间的位置等变量。
总共分析了 29 名介入放射科医生或助手进行的 304 次介入的 517 次测量（有 268 次和无 249 次实时屏幕）。所有 CT 引导的介入均经皮进行，其中大多数（n=280）为微波消融（MWA）。无可视化组的辐射剂量与相应介入类型的常用剂量率相当。实验组的总辐射剂量平均减少 58.1%（11.6 与 4.86 μSv，p=0.034）。在助手角色的放射科医生中观察到最大的 78.5%（15.55 与 3.35 μSv，p=0.002）减少。亚分析显示实时屏幕的使用具有显著的剂量减少（p<0.0001）；考虑到所有变量，仅“助手”角色具有统计学意义（p=0.002）。
在 CT 介入过程中实时可视化主动辐射剂量可显著降低参与放射科医生的辐射剂量。
