A CT scan of the chest can detect the condition of the esophagus (esophagus) and can be used to make a preliminary judgment of the condition of the esophagus and to guide further examination. A large portion of the esophagus is located in the chest and is connected to the stomach through the cardia. CT chest scan can scan most of the esophagus, and during the examination, it can find out the specific condition of the esophagus, the wall of the esophagus and the condition of the lumen of the esophagus, and it can be used to diagnose the diseases such as the foreign body in the esophagus, esophageal cancer, esophageal fistula, and so on. Chest CT can examine the condition of the esophagus, but the gold standard for the diagnosis of esophageal diseases is esophagoscopy.