Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The mediastinal and hilar contours are unremarkable aside from mild unfolding of the descending thoracic aorta . There is no pleural effusion or pneumothorax . The lungs appear clear .
    OUTPUT:
    
No evidence of acute disease . Mild - to - moderate cardiomegaly .