Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which is likely normal . The mediastinal and hilar contours are also unremarkable . Crowding of the bronchovascular structures is present . No overt pulmonary edema is seen . Bibasilar patchy airspace opacities most likely reflect atelectasis . No pleural effusion or pneumothorax is identified . No displaced fractures are seen . Thoracic fusion hardware is incompletely assessed .
    OUTPUT:
    
Low lung volumes . Bibasilar airspace opacities likely reflect atelectasis .