Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Bibasilar airspace opacities may reflect atelectasis but aspiration and pneumonia are not excluded . Small bilateral pleural effusions may be present . Heart size is difficult to assess but is likely within normal limits . Mediastinal and hilar contours are unremarkable , and there is no pulmonary vascular congestion . No pneumothorax is noted . No acute osseous abnormalities are seen .
    OUTPUT:
    
Bibasilar airspace opacities could reflect atelectasis , pneumonia or aspiration . Small bilateral pleural effusions may be present .