Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are mild bibasilar atelectatic changes . No consolidation , effusion , or pneumothorax detected . Cardiomediastinal silhouette is at the upper limits of normal . The aorta is minimally unfolded . The mediastinum is otherwise within normal limits .
    OUTPUT:
    
Minimal bibasilar atelectasis . Otherwise , no acute pulmonary process .