Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest was reviewed . The cardiomediastinal and hilar contours are stable . There is no pneumothorax or large pleural effusion . Lingular scarring is again noted with left hemidiaphragmatic elevation . Increased opacity at the right lung base likely reflects minimal atelectasis . Right total shoulder arthroplasty is again noted . There is no free air under the diaphragm .
    OUTPUT:
    
Minimal right basilar atelectasis .