Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Bilateral upper lobe volume loss , architectural distortion and areas of interstitial opacities in the right upper lobe and left perihilar region appear similar to an earlier radiograph of ___ . Compared to the more recent radiograph from ___ , superimposed acute abnormalities in the right lower and right upper lobes have resolved . Linear scarring at left lung base appears unchanged . There are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
Resolution of acute parenchymal abnormalities since ___ , which may have represented acute pneumonia superimposed upon chronic changes of sarcoid .