Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . Mediastinal and hilar contours are unremarkable aside from mild tortuosity of the aorta . There is no pleural effusion or pneumothorax . Vague opacities at the lung bases are more suggestive of minor atelectasis than pneumonia .
    OUTPUT:
    
Minimal basilar opacification more suggestive of minor atelectasis than pneumonia . Enlarged heart .