Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The segmentectomy site is unchanged . The left pleural effusion has decreased . The radiolucency in the retrosternal area is likely a small amount of pleural air , decreased from prior . The left lung is otherwise clear . The right lung is well expanded and clear . The cardiomediastinal silhouette is normal and unchanged .
    OUTPUT:
    
1 . Unchanged segmentectomy site and smaller left pleural effusion . 2 . The retrosternal pleural air is smaller .