¹²³Iodine-metaiodobenzylguanidine (MIBG) myocardial imaging in patients with AD, DLB, and age-matched normal controls (NC)

Regions of interest over heart (dotted circle) and upper mediastinum (rectangle) on images obtained 3 hours after injection of tracer. Ratios of MIBG uptake over heart compared with upper mediastinum (H/M) are lower for DLB than both AD and NC. H/M are standardized to values comparable to a medium-energy general-purpose collimator condition.