休息时大脑连接的结构和代理估计的测试-重新测试可重现性
Aldana Lizarraga1, Arianna Sala2, Kathrin Koch3
1Department of Nuclear Medicine, TUM School of Medicine and Health, Technical University of Munich, 81675 Munich, Germany.
NeuroImage
|November 24, 2025
概括
结构连接 (SC) 是最可重现的,而18F-氧糖吸收共变率 (FDGcov) 在脑连接的代理估计中显示出最高的可重现性. 门强化了所有措施的可重复性.
科学领域:
- 神经成像是一种神经成像.
- 神经科学是一个神经科学.
- 大脑连接研究研究大脑连接研究
背景情况:
- 大脑连接性通过结构连接性 (SC) 和像功能连接性 (FC),灰色物质体积共变性 (GMVcov) 和18F-氧糖吸收共变性 (FDGcov) 等代理措施来评估.
- 了解这些连接性估计的测试-重新测试可重现性对于检测生理和病理大脑变化至关重要.
研究的目的:
- 在健康受试者中比较组级SC,FC,GMVcov和FDGcov的测试-重复测试可重复性.
- 评估值方法对不同大脑连接度的可重现性的影响.
主要方法:
- 在55名健康休息的受试者中,同时使用PET/MRI获取.
- 基于稀疏度和基于强度的值被应用来分析SC,FC,GMVcov和FDGcov的可再生性.
- 计算了变化系数和重复存在的连接 (PRPC) 的比例.
主要成果:
- 结构连接 (SC) 显示出最高的可重复性.
- 在代理测量中,18F-氧糖摄取共变率 (FDGcov) 呈现出最高的绝对PRPC,表明更广泛的可重复覆盖范围.
- 基于稀疏度和强度的值都提高了可重现性,更强的连接显示了更高的可靠性.
结论:
- 结构连接性是大脑连接的最可复制的衡量标准.
- 18F-氧葡萄糖吸收协变 (FDGcov) 为研究大脑连接在大脑区域提供了最可复制的代理.
- 值是一个必要的分析步骤,以提高大脑连接估计的可靠性.
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