Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax . There is mild S - shaped curvature of the thoracic spine . No displaced rib fracture is detected .
    OUTPUT:
    
No evidence of displaced rib fracture within the limitations of routine chest radiography . If further evaluation is desired dedicated rib series or CT may be obtained .