This trial studies how well radial-probe endobronchial ultrasound works in detecting the complete or partial collapse of the lung in patients undergoing peripheral bronchoscopy. Diagnostic procedures, such as radial-probe endobronchial ultrasound and bronchoscopy, use a thin, tube-like instrument inserted through the nose or mouth to view and take pictures of the inside of the trachea, air passages, and lungs.

PRIMARY OBJECTIVES:

I. To estimate the proportion of patients identified as developing intraprocedural atelectasis detected by radial-probe endobronchial ultrasound (RP-EBUS) during peripheral bronchoscopy under general anesthesia.

SECONDARY OBJECTIVES:

I. To describe the most common locations for developing intraprocedural atelectasis detected by RP-EBUS.

II. To describe the proportion of evaluated bronchial segments per patient that are identified as developing intraprocedural atelectasis by RP-EBUS.

III. To identify patient and procedural characteristics that may predispose to the development of atelectasis.

OUTLINE:

Patients undergo bronchoscopy per standard of care, RP-EBUS of the left and right lungs during bronchoscopy procedure, and RP-imaging over 3-5 minutes at the end of the bronchoscopy procedure.

Inclusion Criteria:

• Patients undergoing bronchoscopy with radial EBUS for peripheral lung lesions
• Recent computed tomography (CT) performed no more than 4 weeks prior to the bronchoscopy
• Voluntary informed consent to participate in the study

Exclusion Criteria:

• Patients with baseline lung consolidation, interstitial changes or lung masses (> 3 cm in diameter) in dependent areas of the lung as seen on most recent CT
• Pregnancy
• Ascites
• Known diaphragmatic paralysis

Adult patients undergoing bronchoscopy with radial EBUS for peripheral lung lesions