Lung HRCT is the abbreviation of Chest High Resolution CT and is charged at$468 in tertiary care hospitals. Chest HRCT is mainly used to distinguish 3 kinds of conditions: ground glass nodules, partially solid nodules and solid nodules. Once small nodules are found on the lungs, clinicians will recommend chest high-resolution CT to further determine the size and nature of the nodules, and it can also be used for the diagnosis and treatment of pulmonary fibrosis. Chest high-resolution CT has a very high resolution and can determine abnormal images with a diameter of less than 1.5mm, so it is widely used in the clinical diagnosis of small nodules and special images of nodules. Lung HRCT can be examined in major tertiary hospitals.