Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post right upper lobe resection , expected postoperative volume loss in the right hemithorax . Persistent area of loculated fluid at the right apex , and slight decrease in opacity adjacent to the operative site . Heart size remains normal . Within the left hemithorax , there is chronic pleural thickening and increased extrapleural fat adjacent to healed rib fractures . Improving linear atelectasis at left lung base . No left pleural effusion but persistent small right pleural effusion .
    OUTPUT:
    
Postoperative changes following right upper lobe resection as described .