If the size of the nodule does not change significantly on review, follow-up is usually necessary, and the interval between reviews may be extended in some patients. For lung nodules that do not change much on review, it is generally recommended to continue to observe them dynamically, and the interval between reviews may vary from patient to patient. For example, for solid lung nodules over 1 cm, if PET-C cannot characterize the nodule or the characterization is negative, and there is no significant change in the nodule after 3 months of review, this can be considered to extend the review interval, and can be changed to annual review. In contrast, if the size of the nodule in the above patients does not change but the solid component increases, then timely clinical intervention therapy or biopsy may be required. For example, if there is no significant change in the size of a pulmonary ground-glass nodule of less than 5 mm in a 2-year review, an extension of the follow-up interval to 4 years may be considered, and if the nodule is found to be significantly reduced in size and resorbed, then termination of the follow-up period may be considered. In conclusion, whether or not to continue to review the lung nodules that have not changed in the review needs to be analyzed on an individual basis, and it is recommended to go to a regular medical institution and follow the physician’s guidance and recommendations.