An x-ray may be helpful in the diagnosis of tracheitis. Findings on an x-ray suggestive of  tracheitis  include subglottic narrowing,  tracheal narrowing and irregularity of tracheal mucosal wall due to edema and exudative membranes. Pulmonary infiltrates due to bronchopneumonia are  frequently seen as a complication of tracheitis.
Tracheitis chest x ray
Air embolism physical examination
Acute bronchitis physical examination
Aspiration pneumonia physical examination
Tracheitis physical examination
Bronchitis physical examination
Cough echocardiography or ultrasound
Farmer's lung physical examination