The USG Hepatobiliary System (HBS) scan is a targeted, precise examination of your upper abdominal organs. This safe, non-invasive ultrasound uses sound waves to create a clear picture of your liver, gallbladder, and bile ducts. It is the gold-standard, first-line test for investigating upper abdominal pain, nausea, or jaundice. This scan is the most effective way to detect gallstones, assess for 'fatty liver' disease, check for liver enlargement, and identify any blockages in the bile ducts. This is a fast, painless, and radiation-free way to get a definitive answer for your digestive and liver health concerns.