Airway Navigation Database Asia for Diagnosis of Peripheral Pulmonary Nodules

Inclusion Criteria: 1. Age ≥18; 2. Chest thin-layer CT show that the peripheral pulmonary nodule (maximum diameter ≤3 cm) is not clearly diagnosed, and planned to be sampled and diagnosed by Augmented Reality Navigation System guided bronchoscopy; 3. The target nodule is evaluated as being able to be reached via bronchoscope under the guidance of Augmented Reality Navigation System before procedure; 4. Patients can understand the study and sign informed consent form. Exclusion Criteria: \- 1\. Contraindications for bronchoscopy: 1. Myocardial infarction whithin 1 month. 2. Active massive hemoptysis. 3. Coagulation dysfunction. 4. Pregnancy. 5. Malignant arrhythmia, severe cardiac insufficiency, extreme systemic failure, etc. 2\. Severe cardiopulmonary dysfunction and other diseases that may significantly increase the risk of procedure; 3. The situations in which the investigators consider that patients are not suitable for this study.