Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Elevation of the left hemidiaphragm is increased compared to ___ . There is associated rightward shift of the heart which remains moderately enlarged . The lungs are clear . There are no pleural effusions . No pneumothorax is seen . The mediastinal contours are normal . The patient is status post midline sternotomy .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Stable enlargement of the cardiac silhouette . 3 . Increased elevation of the left hemidiaphragm .