An upper GI series is a procedure that uses X-rays and a barium-based contrast medium to create images of the inside of the esophagus, stomach, and duodenum. It is a safe, noninvasive imaging tool that can be used to help diagnose pain, acid reflux, bloody stools, and other upper GI symptoms.

Thanks to the contrast agent, the esophagus, stomach, and duodenum will be highlighted on the X-ray film. Through the results of the esophageal-gastric X-ray, doctors will diagnose the disease more accurately and have a more effective treatment regimen. The esophageal-gastric X-ray technique is currently widely prescribed in diagnosis and treatment.