Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Cardiomediastinal contours are within normal limits allowing for this factor . Lungs and pleural surfaces are clear . Multiple healed right rib fractures are present .
    OUTPUT:
    
Low lung volumes . No evidence of pneumonia . If symptoms persist , repeat radiograph with improved inspiratory level may be helpful for more complete evaluation of the lung bases .