Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation , pleural effusion or pneumothorax identified . No evidence of pulmonary vascular congestion or pulmonary edema . Unchanged left lower lung zone atelectasis . The size of the cardiac silhouette is enlarged .
    OUTPUT:
    
Slight enlargement of the cardiac silhouette . Otherwise no evidence of pulmonary vascular congestion or pulmonary edema . Mild left lower lung zone atelectasis is unchanged .