Esophagography generally does not require an empty stomach for the test. However, patients with cardia spasm, esophageal hiatal hernia, or tumors in the lower end of the esophagus in the cardia area should be examined on an empty stomach so as not to affect the examination results. Esophagography can determine the upper and lower ranges of the tumor, and can clearly show the esophageal mucosal structure when doing gas-barium double contrast imaging. And there is generally no need for special preparation before doing esophagography, but if there are patients with cardia spasm, esophageal hiatal hernia, or tumors in the cardia of the lower esophagus, the examination should be performed on an empty stomach. This is to avoid food or food residue from affecting the test results. EsophagographyEsophagography is mainly used to check the esophagus for the presence of lesions, such as iron deficiency dysphagia, ectopic tissue in the esophagus, spontaneous esophageal rupture, esophageal tumors, esophageal shortening, etc., and it can also be used to detect pediatric esophageal foreign bodies.