RAB Versus Ultrathin Bronchoscopy With VBN in the Diagnosis of PPNs

Inclusion Criteria: 1. Age ≥ 18 years, regardless of gender; 2. Patients with peripheral lung nodules of suspected malignancy on chest CT who require non-surgical biopsy; 3. Patients who voluntarily consent to undergo bronchoscopy and meet the requirements for the bronchoscopy; 4. Patients should understand the purpose of the trial, demonstrate good compliance with the examinations and follow-ups, and voluntarily participate in the clinical trial and sign the informed consent form. Exclusion Criteria: 1. Presence of contraindications for bronchoscopy, including: active massive hemoptysis; recent myocardial infarction or unstable angina; severe cardiac or pulmonary dysfunction; severe hypertension and arrhythmias; uncorrectable bleeding tendencies or severe coagulation disorders (such as platelet count \<60×10\^9/L), uremia; severe pulmonary artery hypertension; severe superior vena cava syndrome; intracranial hypertension; acute cerebrovascular events; aortic dissection or aneurysm; multiple bullae; extreme systemic exhaustion; 2. Patients with pure ground-glass nodules suspected of malignancy on chest CT; 3. Female patients who are breastfeeding, pregnant, or planning pregnancy; 4. Patients with electromagnetic active implantable medical devices; 5. Subjects allergic to anesthetics; or with a history of multiple severe allergies, hereditary allergy history; 6. Those who have participated in or are currently participating in drug clinical trials within 3 months before screening, or have participated in other medical device clinical trials within 30 days; 7. Any other conditions deemed unsuitable for participation in this clinical trial by the investigator.