Safety and Effectiveness of Radiofrequency Ablation System in the Treatment of Peripheral Lung Tumors

Inclusion Criteria: 1. Age ≥ 18 years old; 2. Planned ablated main lesions are pathologically confirmed and other planned ablated lesions are pathologically confirmed or clinical evaluated as primary NSCLC or pulmonary metastasis, and the primary lesions of lung metastasis subjects has been well controlled; 3. Number of unilateral lung lesions: ≤ 3 (excepting for multiple primary lung cancers); 4. Each lung lesion in size: ≤3 cm ; 5. Subjects refuse surgery or are considered intolerant of surgery; 6. Subjects refuse or are considered unsuitable for radiotherapy/chemotherapy, or are non-responders for previous radiotherapy/chemotherapy, or has disease progression after radiotherapy/chemotherapy; 7. It is feasible to arrive at the target lesions through bronchus path and carry out ablation operations, assessed by investigators; 8. Subjects whose Eastern oncology cooperative group (ECOG) physical state score: ≤3; 9. Subjects agree to undergo radiofrequency ablation to treat pulmonary lesions. Exclusion Criteria: 1. Subjects with severe bleeding tendency and irreversible clotting disorders; or subjects who have stopped anticoagulation therapy and/or antiplatelet drugs for less than 7 days before ablation; 2. Subjects whose preoperative examination within 1 month shows intrathoracic lymph node or extra-pulmonary metastasis (except for extra-pulmonary metastasis controlled by local therapy); 3. Planned ablated lesions have received radiotherapy within past 6 months; 4. Subjects with high-risk disease for ablation operation; 5. The nearest distance between the tumors and trachea, main bronchial tube, esophagus, aortic arch branch, main pulmonary artery, left and right pulmonary artery and the heart is less than 2cm; 6. Subjects who have participated in the last 30 days or is participating in other clinical studies; 7. Subjects who are pregnant or have pregnancy plan during the study; 8. Subjects with bronchoscopy contraindications; 9. Subjects with implantable cardiac pacemakers, implantable defibrillators, or other active implants; 10. Subjects with general anesthesia contraindications; 11. Subjects with other conditions that need to be excluded as determined by investigators.