Hi. If you are just interested in knowing only about the stomach which is part of the gut, then there are 2 available tests.. Endoscopic studies or a radiological barium swallow X ray.. These are 2 available tests done to exclusively study the stomach and esophagus.. The cost of these depend on the institutions where you are going to get the test.. On an average both the test should cost you not more than Rs 2000 INR... Contact the institution/hospital where you are intending to get these tests done for better info....