Chest CT can show the cardia, but it is difficult to detect cardia disease using chest CT and requires the use of upper abdominal CT or gastroscopy. Chest CT mainly examines the lungs, chest wall, mediastinum, ribs, and large-vessel disease of the chest, etc. It can clarify inflammation of the lungs, space-occupying lesions (e.g., cystic, parenchymal, fatty, and calcific lesions, and can clarify the location and extent of the lesions, etc.), rib fractures, and large-vessel disease of the chest. Chest CT can also scan the cardia and part of the fundus. However, it is difficult to detect cardia disease comprehensively by chest CT. Checking cardia disease is usually done by upper abdominal CT, which can see liver, gallbladder, lower esophagus, stomach, spleen, part of colon and small intestine, pancreas, etc., and can better clarify whether there is any mass occupying the cardia and the interior or surrounding of the stomach. Gastroscopy is a good way to see if there is inflammation, ulcers, small masses, and narrowing deformities in the internal mucosa of the cardia. If you need to examine the cardia, you should choose the examination method under the guidance of your doctor.