Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Emphysematous changes in the upper lobes bilateral . Peripheral / subpleural airspace opacification in the inferolateral aspect of the right upper lobe appears unchanged to minimally improved . The peripheral airspace opacification in the inferolateral aspect of the left upper lobe is improved . No new airspace consolidation . There is interval improvement of the interstitial thickening ( edema or infection ) in the anterior aspects of the upper lobes . No pleural effusions . Left - sided PICC line in situ with the tip in the lower SVC . Spondylotic changes of the thoracic spine . Evidence of previous cholecystectomy .
    OUTPUT:
    
Mild interval improvement .