Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and mediastinal clips are again noted . Lung volumes are low . There is hilar congestion and mild pulmonary edema . No large effusion or pneumothorax . Subtle opacity in the left infrahilar region may represent a superimposed pneumonia in the correct clinical setting . Cardiomediastinal silhouette is stable . Aortic calcification again noted . Bony structures are intact .
    OUTPUT:
    
Mild pulmonary edema . Opacity in the left infrahilar region , question an early pneumonia .