Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube ends 5 .0 cm above the level of the carina , not significantly changed . A right subclavian central venous catheter ends in the mid SVC , unchanged . An enteric catheter courses below the level of the diaphragm and out of the field of view inferiorly . There has been an improvement in the degree of aeration of the left lower lung , although moderate retrocardiac atelectasis persists . Mild right lower lung atelectasis has improved . The remainder of the lungs is clear . Moderate cardiomegaly is unchanged . Enlargement of the pulmonary arteries at the level of the hila is unchanged . The mediastinal contours are unchanged .
    OUTPUT:
    
1 . Improved left lower lung aeration . 2 . Unchanged moderate cardiomegaly .