Bellyknot:I'm sorry. You would probably like a better idea of what to expect during your HIDA. It is performed in the nuclear medicine department. You will be taken into a room with a scanner that will be positioned over your abdomen, but is not at all claustrophobic. They will inject you with a radioactive tracer which has no effect at all in terms of side effects, and then you will lie under the scanner for a period of time (30 to 60 minutes depending on your individual situation). Then a nurse comes in and injects you with the CCK. You continue to be scanned during this time, and you may have some abdominal cramping. Some people do, some people don't. You will continue with another 15 to 30 minutes of scanning, again, depending on your situation).I have seen several studies indicating people with IBS often have sluggish gallbladder functioning, presumably related to neuromuscular dysfunction of some sort. The problem is making the decision to have the gallbladder removed, which too many doctors take too lightly in such cases.Anyway, good luck with your scan. JR