Deep Learning Model for Pure Solid Nodules Classification

Inclusion Criteria: * Participants scheduled for surgery for radiological finding of pulmonary pure-solid lesions from the preoperative thin-section CT scans; * The maximum short-axis diameter of lymph nodes less than 3 cm on CT scan; * Age ranging from 18-75 years; * definied pathological examination report available; * Obtained written informed consent. Exclusion Criteria: * Multiple lung lesions; * Poor quality of CT images; * Participants with incomplete clinical information; * Participants who have received neoadjuvant therapy before initial CT evaluation.