Foreground log averages show lower geometric mean relative middle echo prediction error at 0.01-0.10 Hz than above 0.10 Hz in 31 native ds000210 scans

We tested a fixed echo prediction rule in all 31 native resting scans from OpenNeuro ds000210. The rule predicts the middle echo from the first and third echoes. It uses the mean of log magnitude in a fixed foreground mask. The slow band is 0.01 to 0.10 Hz. The fast band is above 0.10 Hz through Nyquist. The geometric mean fast-to-slow relative error ratio is 2.811. Its whole-person bootstrap 95 percent interval is 2.062 to 3.793. Slow-band relative error is lower under the primary rule. The package preserves all source hashes, derived series, masks, code, results, nine fixed checks, and replay evidence. The result concerns global recorded MR signals. It does not establish a neural cause or denoising accuracy.

multi-echo fMRI · echo prediction · spectral error · resting-state fMRI · OpenNeuro ds000210