What Is an Upper Gastrointestinal (GI) Series?
An upper GI series is a procedure in which a doctor uses x-rays, fluoroscopy, and a chalky liquid called barium to view your upper GI tract. The barium will make your upper GI tract more visible on an x-ray.
The two types of upper GI series are
- a standard barium upper GI series, which uses only barium
- a double-contrast upper GI series, which uses both air and barium for a clearer view of your stomach lining
Source: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)