Lewis R A, Angelchik J P, Cohen R
Radiology. 1980 Jun;135(3):630. doi: 10.1148/radiology.135.3.7384447.
A ring-shaped radiopaque prosthesis was inserted at the esophagogastric junction in 93 patients for treatment of symptomatic gastroesophageal reflux. The results have been very satisfactory clinically, with only one complication; slip-page of one prosthesis over the body of the stomach. The radiographic appearance is described.