Fig. 8

Typical time activity curves from the left ventricular blood pool, abdominal aorta and the kidneys from one of the study subjects. The observed presence of low activity in the kidneys before the activity in the blood pool has peaked is due to the automatic injection system for delivery of ⁸²Rb providing an infusion of the radioisotope over a 20–40 s period, which does not constitute a true bolus injection