Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are increased and atelectasis has improved . Trace right and small left pleural effusions are improved . Linear segmental right lower lobe opacity represents atelectasis . Normal postoperative mediastinum and heart borders . Right internal jugular central venous catheter is unchanged terminating in the right atrium . No pneumothorax . Multiple old rib fractures .
    OUTPUT:
    
1 . Improved lung volumes and atelectasis . 2 . Trace right and small left pleural effusions are improved since ___ .