Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are again low . The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is similar moderate to severe relative elevation of the right hemidiaphragm compared to the left . Compared to the prior radiographs there is increased widespread opacification of the right upper lobe which is also more prominent than on the more recent of the two chest CT studies . This appearance is concerning for pneumonia superimposed on chronic scarring . There is no pleural effusion or pneumothorax . The patient is status post bilateral shoulder replacements .
    OUTPUT:
    
New opacification of the right upper lobe worrisome for pneumonia superimposed on more chronic changes .