Figure 3From: Components of acquisition-to-acquisition variance in continuous arterial spin labelling (CASL) imagingScreeplot. On the left, screeplot of the first 20 principal components. On the right, scatterplot of the first component score on global CBF values (differences from the mean subject global CBF in ml/100 gr/min). Component scores refer to individual volumes. To increase the clarity of the plot, global CBF was ranked, and sampled at intervals of 200 rank scores.Back to article page