Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax . Healed fractures of the posterior right fourth , fifth and sixth ribs are unchanged .
    OUTPUT:
    
Multiple healed rib fractures , otherwise , normal chest radiograph without evidence of pneumonia .