Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The examination is markedly limited by a severe chest deformity including dextroscoliosis and extensive ___ rod stabilization . Left hemithorax remains markedly opacified , unchanged from ___ . The visualized left upper lobe and right lower lobes are grossly clear . The cardiac silhouette is not well evaluated but appears moderate to severely enlarged . The mediastinum can not be assessed that also appears prominent . It is unclear how much of this is due to increased vascularity . . The patient 's tracheostomy tube terminates 4 .5 cm above the carina .
    OUTPUT:
    
Markedly limited examination which appears grossly unchanged from ___ .