Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is re - demonstrated . The aorta remains tortuous . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . There is likely minimal atelectasis within both lung bases . No focal consolidation , pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Unchanged moderate cardiomegaly . Mild bibasilar atelectasis .