Endobronchial Ultrasound (EBUS) is an imaging technique that combines bronchoscopy and ultrasonography. Thanks to EBUS, bronchoscopy is no longer limited to evaluating only the interior of the airways; it now allows real-time visualization and sampling of areas outside the airways, in the space between the heart and lungs.

A miniaturized ultrasound probe attached to the tip of the bronchoscope displays ultrasound images of lymph nodes, tissues, and blood vessels behind the bronchial wall. EBUS, with its specialized needle, allows access to and sampling from enlarged lymph nodes or lesions (e.g., tumors) adjacent to the bronchi in areas inaccessible by conventional bronchoscopy.