Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy is midline . There are low lung volumes , with basilar atelectasis . No definite infiltrate . No CHF or gross effusion . Minimal blunting of left costophrenic angle is likely present . Mild prominence of the cardiac silhouette is likely accentuated by low lung volumes . No widening of the superior mediastinum is detected . Small metallic densities overlying the lower mediastinum on the AP view are shown on the lateral view to lie high either adjacent to the surface of the skin or outside of the patient .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis and minimal blunting of the left posterior costophrenic angle . No CHF . Doubt frank consolidation .