Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette is unchanged . The aorta is tortuous . Mediastinal and hilar contours are similar . Mild pulmonary vascular congestion is noted . Low lung volumes are present with patchy atelectasis demonstrated in the lung bases . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities identified .
    OUTPUT:
    
Low lung volumes with mild pulmonary vascular congestion and bibasilar atelectasis .