Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is re - demonstrated . The aorta is tortuous and diffusely calcified . Pulmonary vasculature is not engorged . Linear opacities in the lung bases likely reflect areas of atelectasis . A small left pleural effusion is similar to the previous exam . No new focal consolidation or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Bibasilar atelectasis and unchanged small left pleural effusion .