Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to yesterday 's exam , there is improved aeration at the right upper lung with some relatively mild persistent opacity suggesting some residual atelectasis . Left chest tube remains in place . Subcutaneous gas projects over left chest wall . Cardiac silhouette is stable . Thoracotomy changes seen along the left chest wall laterally .
    OUTPUT:
    
Interval improved aeration of the right upper lobe .