Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small left pleural effusion . Bibasilar consolidations are demonstrated . Paucity of the pulmonary vasculature consistent with known history of emphysema . Slight improvement of postoperative left chest wall subcutaneous emphysema . Left pleural drain is in place . No pneumothorax . Slight improvement of pneumomediastinum . Degenerative changes of thoracic spine .
    OUTPUT:
    
1 . No pneumothorax . Slight improvement of left chest wall subcutaneous emphysema . 2 . Small left pleural effusion . 3 . Bibasilar consolidations could represent atelectasis or pneumonia in the appropriate clinical setting . 4 . Stable emphysema .