Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The heart size is top normal . Widening of the superior mediastinal contour may be due to low lung volumes and supine AP technique . There is upper zone vascular redistribution which may be attributable to supine positioning without overt pulmonary edema . Patchy opacities in the lung bases likely reflect areas of atelectasis . No pleural effusion or pneumothorax is detected on this supine exam . Mildly displaced fractures of the left lateral sixth and seventh ribs are noted . Degenerative spurring is seen involving the right acromioclavicular joint .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Mildly displaced left sixth and seventh rib fractures .