Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube is 2 cm above carina . NG tube is in adequate position . Left lower lobe atelectasis has significantly improved . There is only mild residual atelectatic bands . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Left lower lobe atelectasis has significantly improved . There are no new lung opacities .