Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette and pulmonary vasculature are unchanged since the prior examination and unremarkable . Median sternotomy wires are intact and well aligned . In the right base , there is a new vague opacity , which in the appropriate clinical context , may represent pneumonia . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Right basilar opacity , which in the appropriate clinical context , may represent pneumonia .