对 (R) -[11C]PK11195 PET图像定量在多发性硬化症的非侵入性方法的评估
Dimitri B A Mantovani1, Milena S Pitombeira2, Phelipi N Schuck3
1Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo 05403-911, Brazil.
Journal of imaging
|February 23, 2024
概括
这项研究比较了测量多发性硬化症 (MS) 患者 (R) -[11C]PK11195PET摄入量的非侵入性方法. 监督集群分析 (SVCA) 已被证明是动脉输入函数 (AIF) 的可靠替代方案,用于量化追踪器分布体积比率 (DVR).
科学领域:
- 神经成像是一种神经成像.
- 放射化学 放射化学是指辐射化学.
- 神经炎症是一种神经炎症.
背景情况:
- 多发性硬化症 (MS) 是一种神经炎症性疾病,其特征是微质激活.
- (R) -[11C]PK11195是一种正电子发射断层扫描 (PET) 追踪器,用于可视化和量化神经炎症.
- 准确量化标志物吸收对于了解疾病进展和治疗疗效至关重要.
研究的目的:
- 评估 (R) -[11C]PK11195在MS患者和健康对照群 (HC) 中的摄取量的非侵入性PET量化方法.
- 为了比较图像衍生输入函数 (IDIF) 和监督集群分析 (SVCA) 与动脉输入函数 (AIF).
- 评估总发行量 (VT) 和发行量比率 (DVR) 在区分MS和HC时的有用性.
主要方法:
- 动态 (R) -[11C]PK11195 PET和MRI扫描从MS患者和HC患者获得.
- 使用AIF,IDIF (心动脉) 和SVCA (伪参考区域) 计算VT和DVR.
- 统计分析比较了群体之间的摄入量和量化方法之间的相关性.
主要成果:
- 在MS患者和HC患者之间,在多个大脑区域 (灰质,白质,皮质,体,丘脑,脑干) 发现了显著的DVR差异.
- 在非侵入性方法 (IDIF,SVCA) 和AIF (r=0.928,r=0.975,分别;p < 0.0001) 的DVR值之间观察到强烈的相关性.
- (R) -[11C]PK11195摄入量,以VT测量,没有区分MS患者和HC患者,VT (AIF) 和VT (IDIF) 之间的相关性很弱 (r=0.356,p < 0.0001).
结论:
- 使用SVCA进行非侵入性量化是AIF的可靠替代方案,用于在MS中测量 (R) -[11C]PK11195 DVR.
- DVR,但不是VT,有效地区分MS患者和HC患者.
- 在神经炎症研究中,精确的PET量化对于精确的PET量化至关重要.
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