Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs were reviewed . Again seen is mild cardiomegaly with mitral annular calcifications . The mediastinal and hilar contours are stable . Low lung volumes result in bronchovascular crowding . Chronic parenchymal changes are seen . Bibasilar opacities may reflect atelectasis . There is very mild congestion . Degenerative changes are seen in the spine .
    OUTPUT:
    
Low lung volumes with bibasilar opacities , which may represent atelectasis . Infection is not excluded .