 6. Patients with primary pulmonary fibrosis, cystic fibrosis, lung cinerea pneumonia, active tuberculosis, Bronchial obstruction, history of obstructive pneumonia mild to severe COPD were admission, primary lung cancer, other tumor metastasis to the lungs, bronchiectasis, lung abscess, empyema, non-infectious interstitial lung disease, pulmonary edema, atelectasis, pulmonary embolism, pulmonary eosinophil infiltration, pulmonary vasculitis, pleural effusion as the primary foci, aspiration pneumonia, fungal pneumonia and atypical pathogens pneumonia. 