Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Extensive postsurgical changes are again seen throughout the left hemithorax , which is reduced in volume , with leftward shift of the mediastinum , all stable since the ___ study . Again seen are right upper zone peripheral opacities , which are unchanged since the ___ chest radiograph , but new in comparison to older radiographs , for example a ___ study . There is no right pneumothorax or right pleural effusion .
    OUTPUT:
    
1 . No right pneumothorax . Right upper zone peripheral opacities are unchanged since ___ . 2 . Stable appearance of extensive postsurgical changes throughout the left hemithorax .