Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Sutures are seen within the right upper lung field compatible with prior right upper lung resection . There is mild elevation the right hemidiaphragm compatible with volume loss . Subtle increased opacity within the right lung base appears unchanged since ___ , and may reflect chronic scarring or a chronic interstitial process . There is no focal consolidation , pleural effusion or pneumothorax . Resection of the right 5th rib laterally is noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .