Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior examination , there has been interval development of left upper lobe opacification . Elevation of the right hemidiaphragm is stable with right basilar atelectasis . There are otherwise no new focal opacities . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are stable , demonstrating borderline cardiomegaly . A right - approach port has been removed . Pulmonary vascularity is normal .
    OUTPUT:
    
1 . New left upper lobe opacification on the same side of known radiation treatment , which could either be treatment - related parenchymal changes , though infection has a similar imaging appearance . 2 . No pleural or pericardial effusions . Findings were discussed with Dr . ___ at 12 :40 p .m . on ___ .