Cervical CT plain scan can see part of the esophagus, but it cannot examine the whole section. It is necessary to examine the whole section of the esophagus, and it is recommended to choose barium meal contrast and esophageal CT. The esophagus is formed long, starting from the pharynx and running through the neck and chest, etc. Cervical CT examination can see part of the esophageal structure, but due to the limitation of the window position, the whole esophagus can not be observed completely. If there is a need to examine the esophagus, CT or MRI of the esophagus can be chosen, which can reflect the whole esophagus, the structure of the esophageal wall, and the condition of the lumen. In addition, barium esophagography can also be chosen, but it should be noted that barium sulfate is forbidden for those who are suspected of having gastrointestinal perforation, and it is forbidden for those who are suspected of intestinal obstruction. If abnormal narrowing or bulging of the esophagus occurs, it is recommended to go to the hospital in time and listen to the advice of a professional doctor.