Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , the thoracic AP diameter has increased and the diaphragm is flattened , consistent with chronic COPD . The lungs are clear . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
No evidence of pneumonia . Stable chronic radiographic evidence of COPD .