Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Extensive fibrosis is again noted in the right lung , and there is interval increased opacification over the right middle and lower lobes , possibly reflective of worsening fibrosis though superimposed pneumonia or edema is not excluded . Fibrotic changes are also noted along the left lung base . There is a left cardiac device with its leads in stable position . The heart is top - normal in size .
    OUTPUT:
    
Worsening right lung opacity may reflect progression of fibrosis though superimposed pneumonia or edema is not excluded .