Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate cardiac enlargement but no typical configurational abnormality can be identified . Noteworthy is that the patient is status post sternotomy , findings suspicious for previous cardiothoracic surgical intervention . The pulmonary vasculature is not congested . There are some local pleural thickenings along the mid portion of the lateral chest walls , but no other pleural abnormalities can be identified and there is no pneumothorax in the apical area . On the bases , thin plate horizontally oriented scar formations are identified . The lowermost portion of the lung fields are characterized by increased translucency suggestive of some emphysema . There is no evidence of any new acute pulmonary parenchymal infiltrate .
    OUTPUT:
    
Moderate cardiac enlargement without evidence of CHF in patient with evidence of previous sternotomy . No acute pulmonary abnormalities or pneumothorax but basal changes suggestive of emphysema .