Lung CT and chest CT are the same, only some people say it differently, there is no such thing as which one looks fine. Chest CT examination range from the lung tip to the diaphragm, can be compared through the lung window, mediastinal window and get the purpose of diagnostic imaging, through the chest CT examination can be found in the lung lesions, mediastinal lesions, esophageal lesions, heart disease lesions, thoracic cavity and chest wall lesions, breast lesions and spinal lesions, and so on. Lung lesions such as pneumonia, tuberculosis, tumors, etc.; mediastinal lesions such as thymoma, neurogenic tumors, intrathoracic goiter, etc.; cardiac lesions such as cardiomegaly, pericardial effusion, etc.; thoracic cavity and chest wall lesions such as effusion, pleural tumors, lipomas, rib tumors, costal chondromalacia, etc.; spine lesions such as thoracic vertebral compression fracture, intervertebral disc protrusion, etc.. All of the above diseases can be detected from chest CT, no need to fast before the examination, pregnant women are contraindicated.