Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is unchanged . The aorta remains tortuous . Mediastinal and hilar contours are otherwise similar . The pulmonary vasculature is not engorged . Lungs are hyperinflated . Apart from minimal atelectasis in the lung bases and biapical scarring in the lung apices , more pronounced on the right , the lungs are clear . No pleural effusion or pneumothorax is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .