USG Abdomen An imaging technique used to see the internal part of the abdomen through ultrasound, is known as USG Abdomen.It checks the liver, pancreas, kidney, and gallbladder area of the abdomen for any abnormalities.Doctors advise this test to diagnose the cause of stomach pain.It helps to detect any tumors in the abdomen, kidney stones, or any other liver-related disease.It is not a painful scan.It is a simple test that takes 20 -30 minutes to perform.