Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No interval change in the position or appearance of the supporting medical devices . Mild interval decrease in the bilateral airspace opacities . Persisting retrocardiac opacity . No pneumothorax identified . The size and appearance of the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Mild interval decrease in the bilateral airspace opacities , reflective of improving pulmonary edema . No other significant interval change .