A **Barium Test**, often referred to as a barium swallow or barium meal, is a diagnostic imaging procedure used to examine the upper gastrointestinal (GI) tract. During the test, the patient consumes a liquid containing barium sulfate, a contrast medium that coats the lining of the esophagus, stomach, and small intestine. Because barium is radiopaque, it appears white on X-rays, allowing radiologists to clearly visualize the anatomy and identify abnormalities such as ulcers, tumors, strictures, or swallowing difficulties. This non-invasive assessment provides essential real-time structural and functional data, assisting clinicians in diagnosing various digestive disorders and guiding effective treatment plans.