Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube is 3 .3 cm above the carina . There continues to be dense retrocardiac opacity consistent volume loss / infiltrate / effusion . There is also hazy right lower lobe infiltrate . There is mild pulmonary vascular redistribution and moderate cardiomegaly . Compared to the study from 7 hours previous , the aeration in both lungs is slightly improved .
    OUTPUT:
    
Improved aeration with continued retrocardiac opacity .