Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes remain low with unchanged bilateral diffuse lung opacities . There is unchanged cardiomegaly and bilateral pleural effusions right greater than left . No pneumothorax . No interval change in bony thorax .
    OUTPUT:
    
No significant interval change in diffuse pulmonary edema . Superimposed infection can not be entirely excluded .