Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates evidence of prior CABG and median sternotomy . The lungs are mildly hyperinflated allowing for somewhat lordotic patient positioning , suggestive of emphysema . There is minimal interstitial edema . The heart is top normal in size . The mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
1 . Mild interstitial pulmonary edema . 2 . Findings suggestive of underlying emphysema .