Figure 5: Serial short-axis and vertical long-axis slices of stress-rest 99mTc-N-DBODC5 images (b) and stress-rest 99mTc-MIBI images (c) of a representative patient with normal CA (a). Because of intense uptake of technetium 99mTc-MIBI in the liver, high liver background activity can be observed. Furthermore, a false-positive myocardial perfusion defect was also seen in the inferoposterior wall segments supplied by the RCA territory (white arrows). Importantly, however, at stress and rest, the inferoposterior wall segments of 99mTc-N-DBODC5 images are clearly separated from the subdiaphragmatic activity.