Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size , mediastinal , and hilar contours are normal . Midline tracheostomy tube terminates approximately 6 .6 cm above the carina . There is collapse of the right middle lobe , causing a silhouette sign of the right heart border . Multiple old healed left rib fractures are identified .
    OUTPUT:
    
Collapse of the right middle lobe , for which CT chest with contrast is recommended for further evaluation .