Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There is mild unfolding of the thoracic aorta . These features can be seen with a history of hypertension . There is no pleural effusion or pneumothorax . The lungs appear clear . The osseous structures are unremarkable .
    OUTPUT:
    
Mild cardiomegaly . No evidence of acute disease .