通过非侵入式自动化图像衍生输入函数对[F]PI-2620 Tau-PET量化进行评估
Maria Meindl1, Artem Zatcepin2, Johannes Gnörich2
1Department of Nuclear Medicine, LMU University Hospital, LMU Munich, Munich, Germany. maria.meindl@med.uni-muenchen.de.
概括
图像衍生输入函数 (IDIF) 为量化[18F]PI-2620PET扫描提供了一种非侵入性方法,有效地区分渐进性上核麻 (PSP),阿尔茨海默氏病 (AD) 和健康对照.
科学领域:
- 核医学就是核医学.
- 神经成像是一种神经成像.
- 放射性药物量化量化方法
背景情况:
- [18F]PI-2620正子发射断层扫描 (PET) 用于检测神经退行性疾病如PSP和AD的错误折叠tau.
- 使用PET精确量化病理需要可靠的输入函数,动脉输入函数 (AIF) 是黄金标准,但在临床上不切实际.
- 图像衍生输入函数 (IDIF) 提供了一种非侵入性的替代方法,用于量化PET成像中的追踪器吸收量.
研究的目的:
- 为了验证图像衍生输入函数 (IDIF) 与动脉输入函数 (AIF) 的对比,用于[18F]PI-2620 PET量化.
- 通过使用区域分布量 (VT) 来评估绝对[18F]PI-2620 PET量化的可行性和价值.
- 评估非侵入性[18F]PI-2620 PET量化的潜力,以区分PSP和AD患者与健康对照患者.
主要方法:
- 在20名受试者 (10对照组,10名患者) 中,使用各种手动和自动 carotid 动脉提取方法验证 IDIF 与 AIF 的有效性.
- 在一个由40名受试者组成的独立队列中进行小组比较 (15对照组,15PSP,10AD),使用表现最佳的IDIF方法.
- 对VT和VT比率 (罗根地块) 与分布体积 (DV) 比率和标准化吸收值 (SUV) 比率进行比较.
主要成果:
- 对于输入曲线 (r > 0.78) 和曲线下的面积 (AUC > 0.73),IDIF方法与AIF有很高的相关性.
- 使用五个最高的voxel强度值 (max5) 的手动IDIF方法显示VT的AIF相比,相对差异最小 (-6%).
- 区域VT比率,以小脑下部进行缩放,有效地区分PSP/AD患者和健康对照者,优于SUV比率.
结论:
- 无血IDIF是[18F]PI-2620PET量化中动脉血液采样的一个有希望的,非侵入性的替代品.
- 区域[18F]PI-2620 VT比率,特别是当与小脑下部进行缩放时,适合从健康对照中区分PSP和AD.
- 来自简化参考组织建模的DV比率也对区分这些患者群体有效.
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