Fig. 2.

Repeatability and reproducibility of phosphorus magnetic resonance spectroscopy (³¹P-MRS) and near-infrared spectroscopy (NIRS) data. Correlations between trials are shown for ³¹P-MRS (A), NIRS channel 1 (C), and NIRS channel 2 (E). For A, C, and E, the dashed lines represent the 95% confidence intervals for the regression equation. Corresponding Bland-Altman plots are shown for ³¹P-MRS (B), NIRS channel 1 (D), and NIRS channel 2 (F). For Bland-Altman plots, dotted lines represent the 95% limits of agreement.