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相关概念视频

Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...

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Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
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荷兰的PET/CT采购和加工协议.

Dennis B M Dieckens1, Pepijn van Horssen2, Koen A J van Gils3

  • 1Department of Medical Physics, Albert Schweitzer Hospital, Dordrecht, Kingdom of the Netherlands.

EJNMMI physics
|June 19, 2025
PubMed
概括

荷兰医院之间存在PET/CT协议和注射活动的显著差异,导致患者辐射剂量在FDG-WB和PSMA等常见扫描中存在显著差异. 这些不一致性凸显了核医学成像实践中需要标准化的需要.

关键词:
图像质量 图像质量优化 优化 优化 优化聚乙烯/聚乙烯/聚乙烯

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科学领域:

  • 核医学是一种核医学.
  • 放射学 放射学是一门学科.
  • 医疗成像医学成像

背景情况:

  • 阳离子辐射断层扫描/计算机断层扫描 (PET/CT) 对于诊断和分期各种疾病至关重要.
  • 获取和处理协议的标准化对于持续的图像质量和准确的患者管理至关重要.
  • 现有文献表明PET/CT协议的潜在变异性,但来自国家队列的综合数据有限.

研究的目的:

  • 评估荷兰四项常见PET/CT检查采购和加工协议的现有变化.
  • 分析荷兰医院内注射活动,扫描持续时间及其与扫描器灵敏度的相关性.
  • 量化协议变化对患者辐射剂量的影响.

主要方法:

  • 在所有荷兰的核医学部门中,使用PET/CT扫描仪进行了全国性调查.
  • 对于FDG-WB,[18F]F-PSMA,[68Ga]Ga-PSMA和FDG-Brain PET/CT,收集了注射活动,获取时间和重建/后处理设置的数据.
  • 分析包括体重依赖的注射活动,获取计数统计数据,以及与扫描器性能 (NEMA灵敏度) 的相关性.

主要成果:

  • 来自42家医院 (58个PET/CT系统) 的回复显示了注射活动和扫描持续时间的广泛差异,即使对于相同的扫描器模型和检查类型.
  • 扫描器灵敏度与注射活动 × 扫描持续时间的产物对FDG-WB和FDG-Brain具有中度的负相关性,但对[18F]F-PSMA的相关性较小,对[68Ga]Ga-PSMA的相关性不显著.
  • 观察到的注射活性变化导致患者的辐射剂量差异为FDG-WB和FDG-Brain的4-5倍,PSMA标记剂的10倍以上,在考虑其他因素后仍然存在.

结论:

  • 荷兰各医院在PET/CT成像协议中存在显著的不一致性,导致患者辐射剂量存在重大差异.
  • 协议变化不能仅仅通过扫描或采集时间的差异来解释,这表明需要对计数统计和处理设置进行进一步调查.
  • 建议对PET/CT协议进行标准化,以确保一致的诊断准确性,并尽量减少不必要的辐射暴露.