Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Post VATS changes are seen throughout the left hemithorax . A left thoracostomy tube is present . There is no pneumothorax . A large left basilar opacity , postsurgical in etiology , is difficult to differentiate between atelectasis , fluid , and consolidation , is unchanged since the ___ radiograph . The right lung remains well aerated .
    OUTPUT:
    
Minimal change in appearance since the ___ radiograph . Unchanged left lower opacities relating to recent_ VATS . No pneumothorax .