Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lung base atelectasis is improved . Lung volume remains low . There is no pneumothorax or large pleural effusion . Pulmonary edema is mild . No new consolidation is identified . Moderately enlarged cardiac silhouette is stable .
    OUTPUT:
    
Left lung base atelectasis is improved . Mild pulmonary edema is stable .