Lipiodol Localization for Ground-glass-opacity Minimal Surgery

Inclusion Criteria: * Consenting adult patients ≥ 20 years of age * Pulmonary lesion with a ground glass opacity(GGO)component of more than 50% * Patient with lesion size less than 3cm * Persistence or growth of the established lesion within a three month period * Patient who are not contraindicated to surgery * Patients who are willing to sign the informed consent form Exclusion Criteria: * Patients with solid pulmonary lesion * Patients with multiple GGOs need multiple localization * Patients who are contraindicated to surgery * Patients who behave in an uncooperative manner * Unwilling or unable to give informed consent * Pregnant women