Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are within normal limits . Band - like atelectasis is present in the lower lobes , left greater than right , but there are no new areas of consolidation to suggest the presence of pneumonia . Healed left rib fractures are incidentally noted .
    OUTPUT:
    
Bibasilar linear atelectasis . No evidence of pneumonia .