Bronchoscopy is an invasive procedure that permits the direct examination of the larynx, trachea, and bronchi using either a flexible fiberoptic bronchoscope or a rigid metal bronchoscope.

Computed Tomography (CT) Scan

Computed tomography (CT), also known as computerized axial tomography (CAT), or CT scanning computerized tomography is a painless, non-invasive diagnostic imaging procedure that produces cross-sectional images of several types of tissue not clearly seen on a traditional X-ray.