Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate - to - severe pulmonary edema has significantly improved and is now mild . Left lower lobe atelectatic bands are minimal . There are also bilateral small layering pleural effusions without pneumothorax . Mediastinal and cardiac contours are normal .
    OUTPUT:
    
Significant improvement of pulmonary edema , which is now mild .