Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube , right subclavian catheter and NG tube are unchanged in satisfactory position . At least small bilateral pleural effusions are presumed . Bilateral diffuse opacities , likely combination of infection and edema , are minimally better today since yesterday probably due to improvement in edema . Low lung volumes accentuate the cardiomediastinal silhouette . No pneumothorax .
    OUTPUT:
    
Minimal improvement in bilateral diffuse opacities , likely combination of infection and edema , probably due to improvement in edema since yesterday .