Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is accentuated as a result appearing mildly enlarged , but unchanged . The aorta is slightly tortuous . Crowding of bronchovascular structures is present without evidence for overt pulmonary edema . Patchy opacities in the lung bases may reflect atelectasis . No pleural effusion or pneumothorax is present . There are moderate degenerative changes noted in the thoracic spine . Multiple clips are seen in the upper abdomen .
    OUTPUT:
    
Low lung volumes with probable patchy bibasilar atelectasis .