Diet:

To permit timely gallbladder visualization, the adult patient must have fasted for a minimum of 2 and preferably 6 h before administration of the radiopharmaceutical. Children should be instructed to fast for 2–4 h, whereas infants need to fast for only 2 h before radiotracer injection. In the latter group, clear liquids are permissible, if medically necessary. However, fasting for longer than 24 h (including those on total parenteral nutrition), can cause the gallbladder not to fill with radiotracer within the normally expected time frame. Disregard of the above guidelines may result in a false-positive non-visualization of the gallbladder. Patient should bring a fatty meal for after scan.