Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube tip terminates 4 .3 cm cephalad to the carinal . Right PICC tip projects over the right axilla , unchanged . Right IJ tip projects over the cavoatrial junction . Bilateral aeration is slightly improved with decreased patchy airspace opacities . Heart is mildly enlarged . Mediastinal silhouette is not widened . There is no pneumothorax .
    OUTPUT:
    
Mildly improved bibasilar aeration .