Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is enlarged . An area of increased opacity is seen in the right lung base and could correspond to a vague density projecting anterior to the heart in the lateral view . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Vague opacity in the right middle lobe , seen best in the frontal view , could reflect pneumonia . Additional oblique views at full inspiration are recommended for further evaluation .