核医学中的诊断参考水平,用于 pozitron发射断层扫描检查:第一个意大利的多中心数据收集
Alessandra Zorz1, Sabrina Morzenti2, Claudia Bianchi3
1Medical Physics Department, Veneto Institute of Oncology IOV - IRCCS, Via Gattamelata 64, 35128 Padua, Italy.
在多中心研究中,对PET/CT扫描的诊断参考水平 (DRL) 进行了评估. 结果显示符合现有的DRLs,在特定扫描类型中提出PET标记剂和低剂量CT的新典型值.
科学领域:
- 核医学是一种核医学.
- 放射性成像学成像学
- 医学物理 医学物理
背景情况:
- 诊断参考水平 (DRL) 对于医疗成像中的患者辐射保护至关重要.
- 阳离子辐射断层扫描/计算机断层扫描 (PET/CT) 对于癌症诊断,分期和治疗反应评估至关重要.
- 对于PET标记剂,已有确立的DLR,但对于低剂量CT组件缺乏指导方针.
研究的目的:
- 评估不同技术和标记剂的PET/CT扫描的剂量指数.
- 评估是否符合现有的DRL,并在必要时提出新的典型值.
- 为未来更新PET/CT程序的DLR提供信息.
主要方法:
- 一项涉及近13,000个PET/CT扫描的多中心研究于2022年进行.
- 根据使用的放射性药物和扫描长度 (全身,从头顶到脚,大脑) 收集和分析了剂量计数据.
- 数据被分层分类,以评估PET活性和CT剂量指数 (CTDIvol,DLP).
主要成果:
- 所有评估的PET/CT程序都达到或低于现有的DRL.
- 提出了PET标记物的典型值 (每次扫描和每公斤的管理活动).
- 为特定扫描类型提出了低剂量CT组件 (CTDIvol和DLP) 的典型值.
结论:
- 收集的数据支持对PET追踪剂和全身PET/CT中低剂量CT的DLR的审查.
- 这些发现可以指导在头顶到脚部和大脑PET/CT扫描中低剂量CT的新DLR的建立.
- 这项研究符合欧洲关于医疗成像中辐射保护的指令.
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