The x-ray features of the lower esophageal web differ from both the middle esophageal web and the lower esophageal ring. The proximal end of the web (cephalic end) shows symmetrical expansion of the esophagus and the distal end (esophageal vestibular area) shows a double concave surface. This is one of the clinical manifestations of esophageal webbing and esophageal rings. What are the examination methods of esophageal web and esophageal ring? 1.Esophagogram X-ray examination can determine the upper and lower range of the tumor, which has certain reference value for treatment. Double contrast gas-barium imaging can clearly show the mucosal structure of esophagus. 2.Upper gastrointestinal tract imaging Upper gastrointestinal tract imaging is a common examination method for gastrointestinal tract diseases, which refers to the gastrointestinal tract imaging above the duodenum, and the parts of upper gastrointestinal tract imaging include oropharynx, esophagus, stomach and duodenum. The upper gastrointestinal imaging includes the oropharynx, esophagus, stomach and duodenum. The contrast medium is swallowed during the imaging, or “swallowing white potion” as the patient calls it. At present, the most commonly used is barium, such as barium sulfate, which is added to gum Arabic to make a barium gel paste, sometimes with a foaming agent for double contrast, which can more clearly show the small lesions in the digestive tract. 3.Upper gastrointestinal endoscopy Upper gastrointestinal endoscopy, also called esophagus, stomach, duodenoscopy or EGD, is a tiny tube with light and camera at the tip inserted into the upper gastrointestinal tract to observe the first part of the esophagus, stomach and small intestine, duodenum. 4.Barium esophageal fluoroscopy Barium esophageal fluoroscopy is a fluoroscopic method to observe the condition of the esophagus after the patient has taken a barium meal and is used to detect diseases in the esophagus. It is suitable for patients with esophageal diseases.