Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are within normal limits , except for minimal unfolding of the aorta . Mild crowding of bronchovascular markings at both bases medially is slightly more pronounced than on ___ , but could reflect presence of mild bibasilar atelectasis . No frank consolidation is identified . No CHF effusion or pneumothorax detected .
    OUTPUT:
    
Mild crowding of bronchovascular markings at both bases , question slight atelectasis . No focal infiltrate or frank consolidation identified .