Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . The lungs demonstrate a subtle opacity in the right lower lung with air bronchograms . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lung opacity may represent pneumonia in the appropriate clinical setting ; a follow - up radiograph in ___ weeks may be considered to document resolution .