An ultrasound is something that happens regularly and frequently and does not involve radiation.It can be helpful for looking at the structures of the abdomen, including the pancreas, liver and to a certain extent the intestine. It is not helpful for reflux, nor for any inflammatory conditions involving the gut but it can be helpful for conditions such as pyloric stenosis in babies. It involves just a short 15-20 minute attendance in the hospital but it may involve some fasting, so it would usually be something that is performed on an pre-arranged day.