生物标志物 生物标志物
Ashley G Gillman1, Pierrick Bourgeat2, Jurgen Fripp2
1The Australian e-Health Research Centre, Commonwealth Scientific and Industrial Research Organisation, Brisbane, QLD, Australia.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
使用18F-NAV4694和18F-Florbetapir缩短的正电子发射断层扫描 (PET) 扫描协议用于粉样蛋白量化,可显著减少扫描和吸收时间,而不影响临床管理决策.
科学领域:
- 核医学是一种核医学.
- 放射性药物成像技术的成像技术
- 生物标志物的量化和量化.
背景情况:
- 由于单克隆抗体治疗,对粉样质正子辐射断层扫描 (Aβ PET) 的需求日益增加.
- 高昂的成本和有限的补偿推动了对血生物标志物的兴趣,这些生物标志物无法量化粉样蛋白负担.
- 需要为阿尔茨海默病提供成本效益和高效的诊断工具.
研究的目的:
- 评估缩写的18F-NAV4694 (NAV) 和18F-Florbetapir (FBP) PET扫描协议对Centiloid粉样蛋白量化的影响.
- 为了确定缩短的扫描窗口是否可以保持诊断准确性,同时降低成本和提高生产率.
- 评估Aβ PET成像的缩短扫描和吸收时间的可行性.
主要方法:
- 使用Centiloid量化软件分析了38个动态NAV扫描和454个动态FBP扫描.
- 标准50-70分钟的PET采集窗口与缩短的窗口 (50-60,40-50,30-40分钟) 的比较.
- 线性关联建模和布兰德-阿尔特曼分析,以评估在线性纠正缩短扫描后的百叶形误差.
主要成果:
- 在NAV和FBP的缩短和标准扫描窗口之间观察到强烈的相关性 (R2>0.95).
- 在30-40分钟之间获得的NAV扫描显示了平均Centiloid误差为2.7CL,从而减少了50%的扫描时间.
- 在40-50分钟之间获得的FBP扫描显示平均误差为3.3CL,使吸收时间减少了20%.
结论:
- 缩短的NAV (30-40分钟) 和FBP (40-50分钟) PET协议,带有线性校正,不太可能改变临床管理决策.
- 扫描时间 (高达50%) 和吸收时间 (NAV为40%,FBP为20%) 的显著减少是可以实现的.
- 获取窗口的准确时机至关重要,因为在早期的获取期间,跟踪器可能无法达到稳定状态.
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