Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are low . The heart size is mildly enlarged . The mediastinal contours are unremarkable . Patchy bibasilar airspace opacities could reflect atelectasis , aspiration or infection . No large pleural effusion or pneumothorax is demonstrated . There is no overt pulmonary edema . Oral contrast material is seen within the bowel . No acute osseous abnormalities are demonstrated .
    OUTPUT:
    
Bibasilar airspace opacities could reflect atelectasis though infection or aspiration can not be excluded .