人类大脑成像数据的空间和人口相关性之间的不一致
Patrick M Fisher1,2, Kristian Larsen1,3, Pontus Plavén-Sigray1,4
1Neurobiology Research Unit, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.
Human brain mapping
|November 26, 2025
概括
跨区域的大脑成像测量之间的相关性可能具有误导性. 研究应该在解释这些发现时谨慎,因为它们可能不反映真正的参与者级别关系.
科学领域:
- 神经科学是一个神经科学.
- 脑部成像 脑部成像
- 生物统计学 生物统计学
背景情况:
- 人口级大脑图通常用于关联受体结合潜力 (BP) 和功能 (例如,大脑血流,CBF).
- 这些相关性通常通过独立队列的数据在不同地区进行估计,这引发了解释方面的担忧.
研究的目的:
- 调查多式脑成像中跨区域相关性的有效性.
- 突出人口级脑图分析中的潜在偏见和解释问题.
主要方法:
- 在24名健康参与者中利用多式神经成像 ([11C]Cimbi-36 PET和MRI) 来测量区域BP和CBF.
- 使用四种方法估计相关性:从单个/单独的队列跨区域,跨区域内的参与者,以及在线性混合效应模型中.
- 进行模拟研究以评估区域差异对相关性估计的影响.
主要成果:
- 在不同地区发现了显著的正相关性 (ρ̂1.1 = 0.672,p = 0.0023; ρ̂1.2 = 0.659,p = 0.0030).
- 参与者的区域特异性相关性明显较低且不显著 (ρ̂2平均值 = 0.140; ρ̂3 = 0.138, p = 0.26).
- 模拟表明,BP/CBF的区域差异可能会导致跨区域的相关性产生偏差,并增加1型错误率.
结论:
- 人口级大脑图中的跨区域相关性可能不准确地反映参与者级生物关系.
- 解释跨区域的相关性作为生物关系的证据是有问题的,因为潜在的偏见.
- 需要进一步的研究来开发有效的方法来分析人口层面的大脑成像数据和减轻偏见.
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