Gastroscopy is a clearer way to look at gastric diseases, while CT examination is only an indirect way to determine them. Doing gastroscopy can visualize the gastric mucosa, esophageal mucosa and duodenal mucosa lesions, and if necessary, can also perform gastroscopic biopsy or microscopic treatment and so on. If you find the swelling in the stomach, then not only do gastroscopy, but also need to further check the CT of the upper abdomen, in order to understand the foci of the swelling, whether metastasis and so on. So it is said that the two kinds of auxiliary examination, its purpose is different, the examination method is also different. The main thing for stomach diseases is to look at the gastroscope, which is the most accurate examination method. Therefore, patients can go to the hospital when necessary, and cooperate with the doctor to give a perfect electronic gastroscopy examination, in order to help understand whether there is a stomach disease.