Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are low . The heart size is top normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Streaky bibasilar airspace opacities could reflect atelectasis but aspiration can not be excluded . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities in the setting of low lung volumes most likely reflect atelectasis but infection or aspiration can not be excluded .