An Upper GI Series is a medical imaging test that examines the upper part of the digestive system, including the esophagus, stomach, and duodenum. During the procedure, a patient drinks a contrast material called barium, which helps highlight these organs on X-ray images. This test is useful for diagnosing conditions such as ulcers, tumors, and blockages. The procedure typically takes about 30 minutes and is performed in a radiology department. Patients may be asked to follow specific instructions, such as fasting before the test. After the series, the barium will pass through the digestive system, and patients are encouraged to drink plenty of fluids to help eliminate it.