Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Patchy bibasilar airspace opacities are most likely reflective of atelectasis . There is no pleural effusion or pneumothorax . No displaced fractures are identified .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .