Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . There is minimal subsegmental atelectasis in the lung bases . Otherwise the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . No displaced fractures are visualized .
    OUTPUT:
    
Mild subsegmental bibasilar atelectasis . No displaced fractures are visualized . If there is continued concern for a rib fracture , consider a dedicated rib series .