Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly reduced . The heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . Minimal atelectasis is noted in both lung bases . There is no focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities present .
    OUTPUT:
    
Mild bibasilar atelectasis . No definite fracture is identified , but if there is continued clinical concern for rib fracture , then a dedicated rib series is recommended .