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Updated: Feb 24, 2026

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Basics of Multivariate Analysis in Neuroimaging Data
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MV-ComBat和MV-CovBat:多变量框架,用于共同协调多度神经成像数据
bioRxiv : the preprint server for biology
|February 23, 2026
概括
神经成像数据中的批量效应可以模糊结果. 新的多变量方法MV-ComBat和MV-CovBat有效地协调了多度数据,改善了生物信号的保存,并将真实变化与噪声分开.
科学领域:
- 神经成像分析分析神经成像分析
- 统计遗传学 统计遗传学
- 生物统计学 生物统计学
背景情况:
- 跨站点和研究的神经成像数据聚合是常见的.
- 与网站和扫描器相关的批量效应可以掩盖生物变异并引入虚假关联.
- 现有的ComBat方法主要是单变量,无法考虑跨多个指标和特征的依赖性.
研究的目的:
- 开发和评估ComBat的多变量扩展,用于协调复杂的神经成像数据.
- 解决中位数,差异和交叉度量/交叉特征共变的批量效应.
- 为了提高生物信号的保存和准确性,在多站点,多度数神经成像研究.
主要方法:
- 提出了MV-ComBat,这是ComBat的多变量扩展,用于共同协调多个指标.
- 使用实证贝叶斯 (EB) 和贝叶斯马尔科夫链蒙特卡洛 (MCMC) 实现了 MV-ComBat.
- 将CovBat扩展为MV-CovBat,用于跨特征和指标的共变性相关批量效应的潜在空间协调.
主要成果:
- MV-ComBat有效地减少了跨多个指标和特征的批量效应.
- EB的实现对测量误差具有强度;MCMC更好地恢复交叉度量相关性.
- MV-CovBat进一步将真正的生物变异与批量效应分开,当独立性假设被侵犯时.
- 模拟显示MV-ComBat比单变量ComBat提高了相关性恢复和信号保存.
结论:
- MV-ComBat和MV-CovBat提供了一个灵活的框架,用于协调复杂的多度数神经成像数据.
- 这些方法对于大规模,多地点神经成像研究的准确分析至关重要.
- 提出的方法提高神经成像发现的可靠性和可解释性.
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