Fig. 7.

Average MBF errors and standard deviations in % across 48 myocardial regions (8 slices, 6 angular sectors) of the MRXCAT numerical simulation for undersampling factors R = 2, 5, 10 using k-t PCA and k-t SPARSE-SENSE. Strong MBF underestimation occurs upon quantification at R = 10 when the AIF and the myocardial signal intensity-time curves are extracted from the same image upon undersampling. The MBF errors are markedly reduced if the reference AIF is used. In this study, the reference AIF is extracted from a separate image acquired using interleaved scanning