Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of cardiac silhouette is unchanged . Mediastinal contour appears similar . Low lung volumes result in crowding of bronchovascular structures without overt pulmonary edema . Patchy opacities are noted in the lung bases likely reflective of atelectasis . No pneumothorax or pleural effusion is present . No subdiaphragmatic free air is present . Clips are noted in the left upper quadrant of the abdomen .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .