Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Midline sternotomy wires are noted . The lungs appear somewhat hyperinflated with upper lobe lucency , suggestive of underlying emphysema . There is mild pulmonary interstitial edema . Trace fluid tracks along the fissural planes . No pneumothorax is seen . Cardiomediastinal silhouette appears normal . Bony structures appear intact .
    OUTPUT:
    
Mild interstitial edema and trace pleural effusion .