Representative basal, mid and apical short-axis images from BOLD and PET acquisitions at rest and stress are shown in (A). BOLD and PET images acquired at stress showed significant signal elevation compared to the corresponding rest images. Mean myocardial perfusion (Qavg) and BOLD (T2avg) measured from matched slices at rest and stress are shown in (B) and (C), respectively. Qavg during adenosine stress was significantly higher than at rest (B). Similar results were observed for BOLD (C).