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大脑代谢物度的统计非独立性,无论是正常化为肌酸还是水

Richard J Maddock¹

¹Department of Psychiatry and Behavioral Sciences, and Imaging Research Center, University of California Davis, Sacramento, CA, USA.

Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism

|October 18, 2024

概括

质子磁共振光谱 (1H-MRS) 研究可能显示大脑代谢物度之间的虚假相关性. 水的正常化并不能消除这些错误的相关性,挑战1H-MRS研究中的生物学解释.

科学领域:

神经成像是一种神经成像.
生物物理学的生物物理.
统计分析统计分析

背景情况:

质子磁共振光谱 (1H-MRS) 用于测量大脑代谢物度.
研究人员经常将同一voxel中的代谢物值相关联起来,假设具有生物学意义.
统计学非独立性可能会破坏对这些相关性的生物学解释.

研究的目的:

批判性地评估声称水正常化消除1H-MRS数据中的虚假相关性的主张.
调查水的规范化在多大程度上可以防止代谢物度之间的错误相关性.

主要方法:

在代谢物量化中的统计原则的逻辑分析.
在正常化的1H-MRS数据中对相关性模式的实证检查.

主要成果:

水的正常化,类似于肌酸的正常化,并不能消除代谢物值之间的虚假相关性.
水正常化和肌酸正常化代谢物度仍然容易产生错误的相关性.
无论使用哪种规范化方法,统计学非独立性问题仍然存在.

结论:

声称水正常化解决了1H-MRS中的虚假相关性是不准确的.
研究人员在解释正常化代谢物度之间的相关性时必须谨慎.
需要进一步开发方法来解决1H-MRS分析中的虚假相关性.

关键词:

绝对值是指绝对值的绝对值.谷氨酸酸盐的使用方法磁共振光谱学磁共振光谱学代谢合的代谢合部分体积的部分体积.

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