Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest . Diffuse prominent reticular interstitial lung markings are consistent with known emphysema / interstitial lung disease . Increased pulmonary vascular markings and apparent cephalization are consistent with pulmonary vascular congestion with mild edema . Bilateral lower lobe opacities are most consistent with atelectasis . The heart size is normal .
    OUTPUT:
    
Mild pulmonary edema superimposed on chronic interstitial lung disease . Bilateral lower lobe atelectasis without definite focal consolidation .