Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . This accentuates the size of the cardiac silhouette which is likely top normal . Mediastinal and hilar contours are within normal limits . There is crowding of the bronchovascular structures but no pulmonary edema is seen . Patchy bibasilar airspace opacities likely reflect atelectasis , but aspiration can not be excluded . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes . Probable bibasilar atelectasis , but aspiration can not be completely excluded .