Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . The cardiac silhouette is moderate to markedly enlarged , possibly slightly increased as compared to the prior study . No definite focal consolidation is seen . There is no large pleural effusion or pneumothorax . The aorta is calcified . There is mild central pulmonary vascular engorgement .
    OUTPUT:
    
Moderate to markedly enlarged cardiac silhouette , possibly slightly increased as compared to the prior study . Mild central pulmonary vascular engorgement .