Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lung volumes are low . Mild bibasilar atelectasis is unchanged . No pleural effusion or pneumothorax . Hilar contours are normal . The cardiomediastinal contour is enlarged , however mildly decreased in size .
    OUTPUT:
    
The cardiomediastinal contour is enlarged , however mildly decreased in size from ___ .