Figure 1
Myocardial BOLD Variability at Stress Relative to Rest. Box-plot of Myocardial BOLD Variability (σT2 (stress) / σT2 (rest)) computed from T2 maps acquired at 2 min and 10 min post regadenoson administration (p.r.a) is shown. The mean and range of Myocardial BOLD Variability are shown under various conditions. Large Myocardial BOLD Variability is observed at 2 mins p.r.a. compared to rest and is markedly reduced at 10 mins p.r.a. Representative images acquired at the various conditions are shown for reference. Note the marked T2 inhomogeneity in T2 image at 2 min p.r.a compared to rest and 10 min p.r.a. σT2 denotes the standard deviation of myocardial T2.