Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are mildly hyperinflated . Previously noted heterogeneous airspace opacity in the lateral view has resolved in current radiographs . The lungs are clear . No pleural effusion or pneumothorax is seen . Cardio mediastinal and hilar contours are normal .
    OUTPUT:
    
Previously noted opacity in the right upper lobe has resolved . Lungs mildly hyperinflated .