Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive subcutaneous emphysema overlying the right chest wall and neck has improved since ___ , but continues to limit evaluation of the right lung . Again seen are hazy opacities projecting throughout the right lung , likely edema , with overall improved aeration since ___ . A moderate right pleural effusion and right basilar atelectasis are unchanged . Mild left basilar edema is stable . There may be a small right residual basilar pneumothorax .
    OUTPUT:
    
1 . Slightly improved right lung aeration , but persistent moderate asymmetric edema is unusual for this long postoperative course . 2 . Unchanged moderate right pleural effusion . 3 . Improved subcutaneous emphysema overlying the right chest wall . 4 . Small residual right basilar pneumothorax .