Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube and right IJ line are unchanged . There has been interval decrease in the left pleural effusion which is still moderate ; however , aerated lung can not be seen in the left upper lung . There continues to be dense retrocardiac opacity and areas of alveolar infiltrate in the left mid lung and right lower lung . There is pulmonary vascular redistribution compatible with fluid overload . The heart size is moderately enlarged .
    OUTPUT:
    
Decreased left pleural effusion .