Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Interval placement of tracheostomy tube . Uppermost sternotomy wire is fractured , similar to ___ . Other sternotomy wires and mediastinal clips are intact . Lung volumes are low , exaggerating heart size . Mediastinal contours are stable . Retrocardiac opacity is compatible with left base atelectasis . No pneumothorax .
    OUTPUT:
    
Status post tracheostomy tube placement . Low lung volumes with left base atelectasis .