Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . The cardiac silhouette is mild to moderately enlarged . The mediastinal and hilar contours are stable . There is a subtle patchy opacity at the right lung base , which could be due to aspiration or infection . No pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle patchy opacity at the right lung base , which could be due to infection or aspiration . Enlarged cardiac silhouette .