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A, Scatterplot of parenchymal cerebral blood flow determined by ASL (pCBFASL) versus PCMRI-determined parenchymal cerebral blood flow (pCBFPCMRI). The solid black line is the identity line. The correlation coefficient r is 0.73 (P < .001). B, Corresponding Bland-Altman plot. The horizontal dashed lines represent the 95% confidence intervals of the difference between pCBFPCMRI and pCBFASL.
