Click on image to view larger version.

Figure 1 Iodine-123 metaiodobenzylguanidine (MIBG) imaging in a patient with chronic heart failure (HF). Heart (H) and mediastinum (M) were selected, as shown, to measure the H/M ratio. The cardiac MIBG washout rate (WR) was calculated from the initial (left) and delayed images (right).