Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . The lungs appear clear . Findings suggest non-displaced fracture of the right lateral ninth rib with callus . Seventh and eighth rib fractures were apparent on the recent prior radiographs but not as well depicted on these . These are probably subacute or older in age .
    OUTPUT:
    
Non-displaced right - sided rib fractures , probably subacute or older in age . No evidence of acute cardiopulmonary disease