Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear of consolidation , effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . The descending thoracic aorta is tortuous with atherosclerotic calcifications . No displaced rib fractures identified . Degenerative changes seen at the shoulders .
    OUTPUT:
    
No displaced rib fractures . If desired , dedicated rib series could be performed .