Radiopharmaceutical. Tc99m-HIDA shares the same hepatocyte uptake, transport, and excretion pathways as bilirubin.HIDA is excreted in its original radiochemical form without being conjugated or undergoing significant metabolism. . Biliary System. Technique . Filling dynamic images are obtained for 60 minutes (1 image per minute).Emptying dynamic images are obtained for 30-60 minutes post fatty meal.CCK can be injected instead of fatty meal if available..