Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . Lungs are clear , though hyperinflated , which could reflect underlying COPD . No focal consolidation is seen . No pleural effusion or pneumothorax . Heart and mediastinal contours appear normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
COPD without superimposed pneumonia .