Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Lung volumes are low , causing accentuation of the pulmonary vasculature . There is minimal bilateral lower lobe atelectasis . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . There is no pneumothorax . No definite rib fractures are seen .
    OUTPUT:
    
1 . Minimal bibasilar atelectasis . No acute cardiac or pulmonary process . 2 . No definite rib fractures identified . If there is persistent concern for rib fracture , a dedicated rib series is more sensitive .