Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower than on the prior study . There is no focal consolidation , pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are stable with mild - moderate cardiomegaly . The patient is status post median sternotomy . No free intra-abdominal air is seen .
    OUTPUT:
    
No free air .