Lung needle biopsy
A lung needle biopsy is the process of obtaining and examining a sample of lung tissue.

Bronchoscopy
Bronchoscopy is a diagnostic procedure in which a tube with a tiny camera on the end is inserted through the nose or mouth into the lungs. The procedure provides a view of the airways of the lung and allows doctors to collect lung secretions or tissue specimens (biopsy).

Blood gases
Blood gases measure the pH (acidity), oxygen content, and carbon dioxide content of the blood. Usually, blood gases are used to analyze the arterial blood. In rarer cases, venous blood may be used.

Pulmonary function tests
Pulmonary function tests

Lung gallium (Ga.) scan
This is a type of involving radioactive gallium, which helps determine whether a patient has inflammation in the lungs.

Chest X-ray
An of the chest, lungs, heart, large arteries, ribs, and the diaphragm.