Chest CT plain scan is an electronic computed tomography scan of the chest, which is able to examine lung diseases, thoracic cavity diseases, mediastinal diseases and so on. 1. Lung diseases: Chest CT scan can find out the lesions, scope and degree in the lungs, and can also find out whether there are inflammatory reactions and tumor foci in the lungs, which can assist in the diagnosis of emphysema, pneumonia, bronchiectasis and other lung diseases. 2. Thoracic diseases: Chest CT scanning can see whether there is tumor infiltration, pleural thickening, pleural effusion and other manifestations in the thoracic cavity, which can assist in the diagnosis of pneumothorax, pleurisy, rib fracture and so on. 3. Mediastinal disease: Chest CT scan can mostly find the size, location and metastasis of mediastinal tumors, and it has important value for the classification of mediastinal tumors, such as teratoma, thymoma, lymphoma and so on. If you feel uncomfortable, it is recommended to go to a regular hospital as soon as possible and listen to the advice of a professional doctor.