Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Marked volume loss of the right upper lobe has mostly resolved . There is similar mild - to - moderate relative elevation of the right hemidiaphragm . There is also much less density associated with the right hilum with persistent streaky right infrahilar opacification , but markedly reduced , suggesting residual atelectasis or scarring in the right middle lobe . Mild biapical pleural thickening appears stable . There is no definite pleural effusion or pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
Marked improvement in right upper lobe opacification and volume loss , with no definite evidence for pneumonia .