Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is normal . The aorta remains tortuous . There is crowding of the bronchovascular structures , but no overt pulmonary edema . Linear opacities at the lung bases likely reflect atelectasis . Possible trace left pleural effusion is present . No pneumothorax . No free air under the diaphragms . There is gaseous distention of the stomach .
    OUTPUT:
    
No free air under the diaphragms . Low lung volumes with bibasilar atelectasis . Probable small left pleural effusion .