Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right internal jugular sheath ends just above the clavicles . Bilateral chest tubes are unchanged in location and appearance . A small amount of right subcutaneous air is stable . A small right pleural effusion is unchanged . Decreased opacification at the left base likely reflects improvement in atelectasis . Sternal wires are intact . The cardiomediastinal silhouette is unchanged with a normal postoperative appearance . There is no pneumothorax .
    OUTPUT:
    
1 . Improving left basilar atelectasis . 2 . Small right pleural effusion . 3 . No pneumothorax .