Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lines and support devices remain unchanged in position since the ___ radiograph . There is improved aeration of the right lung , with postsurgical changes again seen at the left apex , accompanied by moderate atelectasis and a left pleural effusion . No right pneumothorax or right pleural effusion is present . Right humeral and lumbar spinal hardware are incidentally noted .
    OUTPUT:
    
1 . Improved aeration of the right lung since the ___ radiograph . 2 . Postoperative changes throughout the left lung are stable .