Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to previous exam there is some clearance and to of the left lower lobe atelectasis and better overall aeration of the left lung . Heterogeneous opacity in the right lower lobe remains . The tip of the ET tube appears to be at the carina facing the right mainstem bronchus . Stent in the left lower lobe bronchus noted . Right PICC line in mid to lower SVC as previously . NG tube in the stomach .
    OUTPUT:
    
Improved aeration of the left lung . ET tube at the carina facing the right mainstem bronchus .