Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , consistent with the patient 's history of COPD . The lungs are clear . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process . COPD .