Diurnal Variations and Test-Retest Reliability of Resting-State Functional MRI Metrics.

Hum Brain Mapp · 2026 · PMC13341652 · PMID 42415272

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a decreasing trendno p-value reported

Regarding reliability across different time intervals, ICC values for most regions and networks showed a decreasing trend for ALFF, wALFF, and fALFF, indicating that longer inter‐scan intervals reduce measurement stability.

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