Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube is 5 cm above the carina . There is dense retrocardiac opacity compatible volume loss / infiltrate / effusion . Left upper lung is slightly better aerated than on the prior exam . There continues to be some volume loss / infiltrate in the right lower lung with some minimal obscuration of the right hemidiaphragm . The remainder of the appearance of the chest is unchanged compared to prior .
    OUTPUT:
    
Dense retrocardiac opacity compatible with volume loss / infiltrate / effusion and right lower lobe volume loss / infiltrate .