A chest CT is performed to identify the location, size, shape, number, and growth rate of the lung nodules. Depending on the type and size of the lung nodule, the timing of the review and the next step in the management will be different. The types of lung nodules are categorized into single and multiple, low-risk and high-risk, and the sizes of nodules are ≤4mm, 4-6mm, 6-8mm, and >8mm. Patients with or without risk factors for lung cancer are evaluated differently. For patients with risk factors, if the nodule is ≤4mm, 12-month imaging is required; for 4~6mm nodules, 6~12, 18~24 months imaging follow-up; for 6~8mm nodules, 3~6, 9~12, 24 months imaging follow-up, and all of the above are routinely followed up as if stabilized for the following years. For patients without risk factors, if the nodule is ≤4mm, selective imaging follow-up; 4-6mm nodule, 12-month imaging follow-up, and routine follow-up in the following year if stabilized; 6-8mm nodule, 6, 12, and 18-24 months imaging follow-up, and routine follow-up in the following year if stabilized. Nodes larger than 8mm can be detected using PET-CT technology, non-surgical biopsy, and if there is no abnormality, they can be followed up with low-dose CT scanning for 3-6, 9-12, and 18-24 months. It is recommended that patients actively seek medical attention to clarify the diagnosis so as not to delay the condition.