Differential for absence/paucity of the intrahepatic ducts +/- absent gallbladder?
Alagille syndrome
There is symmetrical extraction of radiotracer from the blood pool by both lobes liver. There is accumulation of radiolabelled radiotracer within the liver with no evidence of radiolabelled bile within the intra or extrahepatic biliary tree.
Delayed planar images do not demonstrate any evidence of radiolabelled bile within the small intestine.