Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Midline sternotomy wires are again noted . There is interval increase in bilateral pleural effusions , remaining small in overall size bilaterally . Increased retrocardiac opacity may reflect atelectasis less likely pneumonia . There is mild hilar congestion and interstitial edema . Heart size and mediastinal contour is unchanged . Bony structures are intact .
    OUTPUT:
    
Mild interstitial edema . Small bilateral pleural effusions increased from prior .