Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy and CABG . Coronary artery stenting is also seen . The cardiac silhouette remains enlarged . The aortic knob appears similar in appearance and calcified . Chronic rib changes in the upper posterior right lateral ribs again seen . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The lungs again remain hyperinflated .
    OUTPUT:
    
No acute cardiopulmonary process . Persistent enlargement of the cardiac silhouette .