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Scatter plot of contrast-to-noise ratio (CNR) from VS regression (6 mm) versus CNR from no-regression, for all “near-corrected” activation-flagged channels (AFCs) (correction channel 25 mm or closer to target channel, center-to-center). A dashed unity line is provided to guide the eye. 317 of the 467 data points have a higher CNR using VS regression, and the overall improvement is statistically significant (; see text for details).
