在3特斯拉对静止状态fMRI功能连接的宏血管贡献的评估
Xiaole Z Zhong1,2, Yunjie Tong3, J Jean Chen1,2,4
1Rotman Research Institute at Baycrest, Toronto, ON, Canada.
Imaging neuroscience (Cambridge, Mass.)
|August 13, 2025
概括
大脑动脉和静脉显著影响静止状态功能连接 (rs-fMRI FC) 映射. 宏观血管信号,特别是来自静脉的信号,对整个大脑的功能连接有很大贡献,影响了BOLD信号的解释.
科学领域:
- 神经成像是一种神经成像.
- 血管生物学 血管生物学
- 功能连接分析 功能连接分析
背景情况:
- 休息状态功能磁共振成像 (rs-fMRI) 通常假设时间相关性反映神经同步.
- 宏血管信号波动对rs-fMRI功能连接 (FC) 的影响仍未得到充分探索.
- 之前的工作确定了内动脉和内静脉fMRI信号之间的反相关性.
研究的目的:
- 系统地分析大脑主要动脉和静脉对整个灰质 (GM) 功能连接的贡献.
- 调查宏血管对rs-fMRI BOLD信号和FC的贡献.
- 描述对FC的宏血管影响的空间特性和程度.
主要方法:
- rs-fMRI数据分析侧重于主要的内动脉和静脉.
- 系统地评估血管系统内和整个GM的宏血管信号相关性.
- 量化空间变异性和宏血管对FC贡献的程度.
主要成果:
- 大血管表现出强烈的内部相关性,动脉和静脉有明显的模式.
- 显著的宏观血管对转基因连接的贡献,静脉显示的效果比动脉更强.
- 宏观血管衍生FC表现出高度的空间可变性,并延伸到血管空间之外.
- 动脉和静脉信号对 rs-fMRI BOLD 和 FC 有着显著的贡献.
结论:
- 大静脉和动脉对 rs-fMRI BOLD 信号和功能连接有很大贡献.
- 宏血管信号,特别是来自静脉的信号,在塑造观察到的FC模式方面发挥着至关重要的作用.
- 这些发现需要改进建模,以解释并可能消除宏血管贡献,以实现精确的神经解释.
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