Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . There is pulmonary vascular redistribution and ill - defined vascularity . There are bilateral areas of volume loss in the lower lungs . There is dense retrocardiac opacity compatible with volume loss / infiltrate / effusion . There are patchy areas of alveolar infiltrate most marked in the left lower lung .
    OUTPUT:
    
Fluid overload . An underlying infectious infiltrate on the left can not be excluded