评估Ga-PSMA-11和F-PSMA-1007PET/CT的生物分布,使用基于患者间和患者内的分析
Cristina E Popescu1, Boya Zhang2, Thomas Sartoretti3
1Department of Nuclear Medicine, Cantonal Hospital Baden, Baden, Switzerland.
EJNMMI research
|April 5, 2024
概括
在前列腺癌患者中,F-PSMA-1007显示出比Ga-PSMA-11更高的肝脏和脏吸收. 尽管存在差异,但转化因子可能允许F-PSMA-1007指导放射性连接体治疗选择.
科学领域:
- 核医学就是核医学.
- 放射化学 放射化学是指辐射化学.
- 在瘤学瘤学.
背景情况:
- [68Ga]Ga-PSMA-11 PET的肝脏吸收是[177Lu]Lu-PSMA-617放射性连接体治疗 (RLT) 患者选择的参考.
- 需求的增加导致[68Ga]Ga-PSMA-11被[18F]F-PSMA-1007取代,这是一个具有不同的生物分布的标记器.
- 脏吸收被提议作为F-PSMA-1007的新参考.
研究的目的:
- 为了比较[68Ga]Ga-PSMA-11和[18F]F-PSMA-1007之间的患者内标记物分布.
- 评估[18F]F-PSMA-1007作为RLT患者选择的内部参考的适用性.
主要方法:
- 在一年内,50名患者接受了PET扫描,使用F-PSMA-1007和Ga-PSMA-11.
- 平均标准化吸收值 (SUV平均) 在肝脏,脏,唾液腺,血液池和骨中测量.
- 瘤,复发,淋巴结和转移被评估为内部和个人之间的比较.
主要成果:
- 肝脏和脏SUV平均值与[18F]F-PSMA-1007相比[68Ga]Ga-PSMA-11 (p <.05) 显著更高.
- 血液池吸收在两个标志物之间是可比的.
- 在两个标记剂的个体内肝脏摄入量之间发现了强烈的线性关联 (r = .78,p < .001).
结论:
- 肝脏吸收Ga-PSMA-11仍然是最强大的内部参考.
- [18F]F-PSMA-1007表现出较高的肝脏和脏吸收,但与[68Ga]Ga-PSMA-11肝脏吸收有很强的相关性.
- 肝脏吸收[18F]F-PSMA-1007的转化因子可能使其用于RLT选择.
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