Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar opacities localizing to the middle lobe and lingula . While some of this could represent scarring and prominent fat pad as seen on prior chest CT , findings are slightly progressed even given differences in technique . There is also some streaky retrocardiac opacities on the lateral view which may correlate with mucous plugging seen on prior chest CT . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities . Degenerative changes partially visualized at the shoulders .
    OUTPUT:
    
More dense consolidation in the lingula and right middle lobe . Some of this may be due to the atelectasis , scarring and prominent fat pad , there is suspected superimposed acute infection given apparent progression of these changes since recent prior chest CT .