Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mild to moderately enlarged . Mediastinal contours are stable and unremarkable . The patient is status post median sternotomy . The lungs are hyperinflated . There is blunting of the right costophrenic angle which may be due to a small pleural effusion . No focal consolidation is seen . There is no pneumothorax . No overt pulmonary edema is seen .
    OUTPUT:
    
Possible small right pleural effusion . Mild to moderate cardiomegaly .