Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post prior median sternotomy . The lungs are hyperexpanded . There are small bilateral pleural effusions with overlying atelectasis , greater on the right . There is mild persisting pulmonary edema and enlargement of the cardiac silhouette . No pneumothorax identified .
    OUTPUT:
    
Mild pulmonary edema . Small right pleural effusion with overlying atelectasis . Hyperexpanded lungs .