Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Monitoring and support devices are appropriately positioned . Median sternotomy wires are intact . The parenchymal opacities in the right lung are slightly improved , as is the aeration of the right lung . Parenchymal opacities and left lung are unchanged . No large pleural effusion . No pneumothorax .
    OUTPUT:
    
Slight interval improvement in aeration of the right lung and appearance of pulmonary opacities . Unchanged appearance of left lung .