Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . The aorta is tortuous and demonstrates atherosclerotic calcifications at the arch . Streaky bibasilar airspace opacities most likely reflect atelectasis . No pleural effusion or pneumothorax is seen . Crowding of the bronchovascular structures is due to low lung volumes , with no pulmonary edema identified . No acute osseous abnormalities are detected .
    OUTPUT:
    
Low lung volumes with streaky bibasilar airspace opacities most likely reflecting atelectasis . Infection can not be completely excluded .