Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low inspiratory volumes . Heart size is borderline . There is atelectasis at both lung bases . No definite infiltrate is identified . No effusion is seen . No CHF . Bilateral spinal rods are again noted . Old healed right and left posterior rib fractures noted .
    OUTPUT:
    
Bibasilar atelectasis . Possibility of early pneumonic infiltrates can not be entirely excluded , but no frank consolidation is identified .