Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate pulmonary hyperexpansion with relative lucency in the apices consistent with emphysema . Mild to chronic cardiomegaly is chronic , pulmonary vasculature is engorged and mild interstitial edema , though not as severe as on ___ was not present on ___ . The mediastinal contours are normal .
    OUTPUT:
    
Emphysema . Recurrent mild CHF .