Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild left base atelectasis is seen without definite focal consolidation . The lungs are relatively hyperinflated with flattening of the diaphragms and biapical scarring suggesting chronic obstructive pulmonary disease . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . No pulmonary edema is seen .
    OUTPUT:
    
Mild left base atelectasis without definite focal consolidation .