在体内实时追踪正子辐射粒子 (PEPT) 和单颗粒PET
Juan Pellico1, Laurence Vass1, Amaia Carrascal-Miniño1
1School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.
Nature nanotechnology
|January 19, 2024
概括
聚子辐射粒子追踪 (PEPT) 现在可以在体内对单个纳米粒子进行成像. 这一突破使实时,全身血液动力学评估与最小的放射性剂量.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 粒子物理学 粒子物理学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 定子发射粒子跟踪 (PEPT) 提供了放射标记颗粒的高分辨率3D跟踪.
- 对于PEPT的生物医学应用,在放射性标记生物相容颗粒和隔离单个亚微米颗粒方面存在挑战.
研究的目的:
- 开发用于合成和放射性标记生物相容纳米颗粒的方法,用于体内PEPT.
- 证明单个纳米粒子体内PEPT和动态PET成像的可行性.
主要方法:
- 合成和-68 (68Ga) 放射性标记均的纳米粒子 (直径950nm).
- 开发用于隔离和操纵单个放射性标记纳米粒子的协议.
- 在体内PEPT和动态正子发射断层扫描/计算机断层扫描 (PET/CT) 在临床前模型中对单个纳米粒子进行成像.
主要成果:
- 实现了68个Ga标记的纳米粒子 (每颗粒子2.1±1.4kBq) 的前所未有的特定活动.
- 成功地隔离和操纵了一个微米以下的放射标记颗粒.
- 在体内证明PEPT和动态PET/CT成像单个纳米粒子.
结论:
- 这项研究介绍了纳米粒子放射标记和单颗粒操纵PEPT的关键进展.
- 能够在体内进行定量,实时,全身血液动力学评估.
- 提供了一种使用最小放射性剂量和临床前研究材料的新方法.
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