Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Hyperexpansion of the lungs is consistent with emphysema . The patient is post CABG . In the right middle lobe , there are two heterogeneous opacities , the more medial opacity is more well marginated and slightly atypical in appearance for pneumonia . Hemorrhage is another possible etiology . The left lung is clear . There is no pleural effusion or pneumothorax . Heart , mediastinum , and hilar contours are normal .
    OUTPUT:
    
Two heterogeneous opacities in the right middle lobe may be pneumonia or hemorrhage . The more medial opacity is more well marginated and slightly atypical in appearance for pneumonia . If clinically indicated , chest CT can better assess these areas . These findings were discussed with Dr . ___ at ___ by telephone .