Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is dense retrocardiac opacity compatible with volume loss / infiltrate / effusion . There is pulmonary vascular redistribution and patchy areas of alveolar infiltrate in the left mid lung and right lower lung . There is volume loss in the right lower lung . The ET tube and NG tube are unchanged
    OUTPUT:
    
Pulmonary edema . It is unclear if there is an infiltrate in either lower lobe or if the opacity is due to volume loss