Your doctor may decide to use a special X-ray procedure — the barium swallow radiograph — to rule out any structural problems in your esophagus. In this painless acid reflux test, you will be asked to swallow a solution of barium. The barium enables doctors to take X-rays of your esophagus.
grading In 1977, a grading system of gastroesophageal reflux on barium study was devised. It is based on the extent of retrograde flow of barium. Grade
Diagnosing Acid Reflux With Endoscopy or EGD. During an endoscopy, the doctor inserts a small tube with a camera on the end through the mouth into the esophagus. This enables the doctor to see the lining of the esophagus and stomach.