Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post CABG with sternotomy wires unchanged from the prior examination . There is mild stable cardiomegaly . There is minimal interstitial edema and mild peripheral edema as well as peribronchial cuffing . There is a subtle focal opacity at the right infrahilar region which may represent asymmetric edema or an early focus of pneumonia . There is no large pleural effusion or pneumothorax identified .
    OUTPUT:
    
1 . Subtle , focal opacity at the right infrahilar region , which may represent asymmetric edema or an early focus of pneumonia . 2 . Mild pulmonary edema .