Temporal Shift When Comparing Contrast-Agent Concentration Curves Estimated Using Quantitative Susceptibility Mapping (QSM) and ΔR2*: The Association Between Vortex Parameters and Oxygen Extraction Fraction.

For both area and Λ, the trendlines, included for completeness, showed a trend of decreasing vortex parameter (corresponding to increasing OEF) with increasing age, although the hypothesis that the correlation coefficient was equal to zero could not be rejected, neither for vortex area nor for Λ.

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