Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable with calcification of the aortic knob . There is no pleural effusion or pneumothorax . There is scarring at the left lung base , which is unchanged compared to the radiograph from ___ . Again demonstrated are severe upper lobe predominant emphysematous changes . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
No pneumonia or other acute abnormality . Dr . ___ ___ these results with Dr . ___ at 4 :22 p .m . on ___ , 20 minutes after the time of discovery via telephone .